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Computing with Decimals

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Adding and Subtracting Decimals

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Line up the decimal points. 4.6 + 7.23

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Line up the decimal points. 4.6 + 7.23 4.60 + 7.23

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Fill in with zeros. 4.6 + 7.23 4.60 + 7.23

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Fill in with zeros. 4.6 + 7.23 4.60 + 7.23

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Add or subtract normally. 4.6 + 7.23 4.60 + 7.23

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Add or subtract normally. 4.6 + 7.23 4.60 + 7.23 11 83

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Place the decimal point under the other decimal points. 4.6 + 7.23 4.60 + 7.23 11 83

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Place the decimal point under the other decimal points. 4.6 + 7.23 4.60 + 7.23 11.83

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Line up the decimal points. 12 − 2.46

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Line up the decimal points. 12 − 2.46 12 has a decimal point hidden behind it.

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Line up the decimal points. 12 − 2.46 12.00 − 2.46

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Fill in with zeros. 12 − 2.46 12.00 − 2.46

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Fill in with zeros. 12 − 2.46 12.00 − 2.46

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Add or subtract normally. 12 − 2.46 12.00 − 2.46

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Add or subtract normally. 12 − 2.46 12.00 − 2.46 9 54

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Place the decimal point under the other decimal points. 12 − 2.46 12.00 − 2.46 9 54

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Place the decimal point under the other decimal points. 12 − 2.46 12.00 − 2.46 9.54

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Line up the decimal points. 15.2 − 7.93

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Line up the decimal points. 15.2 − 7.93 15.20 −7.93

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Fill in with zeros. 15.2 − 7.93 15.20 −7.93

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Fill in with zeros. 15.2 − 7.93 15.20 −7.93

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Add or subtract normally 15.2 − 7.93 15.20 −7.93

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Add or subtract normally 15.2 − 7.93 15.20 −7.93 7 27

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Place the decimal point under the other decimal points. 15.2 − 7.93 15.20 −7.93 7 27

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Place the decimal point under the other decimal points. 15.2 − 7.93 15.20 −7.93 7.27

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Line up the decimal points. Fill in with zeros. Add or subtract normally. Place the decimal point under the other decimal points. 24.5 – 13

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Line up the decimal points. Fill in with zeros. Add or subtract normally. Place the decimal point under the other decimal points. 16.8 + 4.72

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Line up the decimal points. Fill in with zeros. Add or subtract normally. Place the decimal point under the other decimal points. 143.2 + 4.18

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Line up the decimal points. Fill in with zeros. Add or subtract normally. Place the decimal point under the other decimal points. 35 – 4.5

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Line up the decimal points. Fill in with zeros. Add or subtract normally. Place the decimal point under the other decimal points. 2.14 + 8.4

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Line up the decimal points. Fill in with zeros. Add or subtract normally. Place the decimal point under the other decimal points. 9 – 3.65

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Line up the decimal points. Fill in with zeros. Add or subtract normally. Place the decimal point under the other decimal points. 4.02 + 0.75

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Line up the decimal points. Fill in with zeros. Add or subtract normally. Place the decimal point under the other decimal points. 8.4 – 2.13

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Line up the decimal points. Fill in with zeros. Add or subtract normally. Place the decimal point under the other decimal points. 5 + 0.52

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Line up the decimal points. Fill in with zeros. Add or subtract normally. Place the decimal point under the other decimal points. 12 – 0.68

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Multiplying Decimals

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Remove any extra zeros. 0.54 x 1.20.54 x 1.2 0.064 x 2.09.064 x 2.09 340 x 0.50 340 x.5 4.03 x 6.304.03 x 6.3

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Remove any extra zeros. 0.70 x 2.05.7 x 2.05 0.003 x 1.10.003 x 1.1 500 x 2.70 500 x 2.7 0.082 x 0.09.082 x 0.09

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Find the number that has the most digits NOT INCLUDING zeros on the front..54 x 1.2 2 digits

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Find the number that has the most digits NOT INCLUDING zeros on the front..064 x 2.09 2 digits3 digits

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Find the number that has the most digits NOT INCLUDING zeros on the front. 340 x.5 3 digits1 digit

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Find the number that has the most digits NOT INCLUDING zeros on the front. 4.03 x 6.3 3 digits2 digits

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Find the number that has the most digits NOT INCLUDING zeros on the front..7 x 2.05 1 digit3 digits

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Find the number that has the most digits NOT INCLUDING zeros on the front..003 x 1.1 1 digit2 digits

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Find the number that has the most digits NOT INCLUDING zeros on the front. 500 x 2.7 3 digits2 digits

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Remove any extra zeros. 0.47 x 0.2

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Remove any extra zeros. 0.47 x 0.2

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Find the number that has the most digits NOT INCLUDING zeros on the front. 0.47 x 0.2

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Find the number that has the most digits NOT INCLUDING zeros on the front. 0.47 x 0.2 2 digits

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Find the number that has the most digits NOT INCLUDING zeros on the front. 0.47 x 0.2 2 digits1 digit

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Put that number on top lining up the right side of the problem. 0.47 x 0.2 2 digits1 digit

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Put that number on top lining up the right side of the problem..4 7 x.2

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Multiply normally..4 7 x.2

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Multiply normally..4 7 x.2 9 4

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Count the total number of decimal places in the problem..4 7 x.2 9 4

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Count the total number of decimal places in the problem..4 7 x.2 9 4 2 decimal places

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Count the total number of decimal places in the problem..4 7 x.2 9 4 2 decimal places +1 decimal place

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Count the total number of decimal places in the problem..4 7 x.2 9 4 2 decimal places +1 decimal place 3 decimal places

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Put that many decimal places in the answer..4 7 x.2 9 4 2 decimal places +1 decimal place 3 decimal places

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Put that many decimal places in the answer..4 7 x.2 9 4 2 decimal places +1 decimal place 3 decimal places 1 decimal place

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Put that many decimal places in the answer..4 7 x.2 9 4 2 decimal places +1 decimal place 3 decimal places 2 decimal places

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Put that many decimal places in the answer..4 7 x.2.0 9 4 2 decimal places +1 decimal place 3 decimal places

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Put that many decimal places in the answer..4 7 x.2.0 9 4

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Remove any extra zeros. 3.45 x 0.004

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Remove any extra zeros. 3.45 x 0.004

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Find the number that has the most digits NOT INCLUDING zeros on the front. 3.45 x 0.004

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Find the number that has the most digits NOT INCLUDING zeros on the front. 3.45 x 0.004 3 digits

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Find the number that has the most digits NOT INCLUDING zeros on the front. 3.45 x 0.004 3 digits1 digit

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Put that number on top lining up the right side of the problem. 3.45 x 0.004 3 digits1 digit

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Put that number on top lining up the right side of the problem. 3. 4 5 x. 0 0 4

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Multiply normally. 3. 4 5 x. 0 0 4

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Multiply normally. 3. 4 5 x. 0 0 4 1 3 8 0

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Count the total number of decimal places in the problem. 3. 4 5 x. 0 0 4 1 3 8 0

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Count the total number of decimal places in the problem. 3. 4 5 x. 0 0 4 1 3 8 0 2 decimal places

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Count the total number of decimal places in the problem. 3. 4 5 x. 0 0 4 1 3 8 0 2 decimal places +3 decimal places

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Count the total number of decimal places in the problem. 3. 4 5 x. 0 0 4 1 3 8 0 2 decimal places +3 decimal places 5 decimal places

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Put that many decimal places in the answer. 3. 4 5 x. 0 0 4 1 3 8 0 2 decimal places +3 decimal places 5 decimal places

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Put that many decimal places in the answer. 3. 4 5 x. 0 0 4 1 3 8 0 2 decimal places +3 decimal places 5 decimal places 1 decimal place

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Put that many decimal places in the answer. 3. 4 5 x. 0 0 4 1 3 8 0 2 decimal places +3 decimal places 5 decimal places 2 decimal places

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Put that many decimal places in the answer. 3. 4 5 x. 0 0 4 1 3 8 0 2 decimal places +3 decimal place 5 decimal places 3 decimal places

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Put that many decimal places in the answer. 3. 4 5 x. 0 0 4 1 3 8 0 2 decimal places +3 decimal place 5 decimal places 4 decimal places

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Put that many decimal places in the answer. 3. 4 5 x. 0 0 4.0 1 3 8 0 2 decimal places +3 decimal place 5 decimal places

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Put that many decimal places in the answer. 3. 4 5 x. 0 0 4. 0 1 3 8 0

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Remove any extra zeros. 3.40 x 1.98

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Remove any extra zeros. 3.40 x 1.98

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Find the number that has the most digits NOT INCLUDING zeros on the front. 3.40 x 1.98

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Find the number that has the most digits NOT INCLUDING zeros on the front. 3.40 x 1.98 2 digits

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Find the number that has the most digits NOT INCLUDING zeros on the front. 3.40 x 1.98 2 digits3 digits

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Put that number on top lining up the right side of the problem. 3.40 x 1.98 2 digits3 digits

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Put that number on top lining up the right side of the problem. 1. 9 8 x 3. 4

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Multiply normally. 1. 9 8 x 3. 4

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Multiply normally. 1. 9 8 x 3. 4 7 9 2

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Multiply normally. 1. 9 8 x 3. 4 7 9 2 5 9 4 0

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Multiply normally. 1. 9 8 x 3. 4 7 9 2 5 9 4 0 6 6 3 2

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Count the total number of decimal places in the problem. 1. 9 8 x 3. 4 7 9 2 5 9 4 0 6 6 3 2

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Count the total number of decimal places in the problem. 1. 9 8 x 3. 4 7 9 2 5 9 4 0 6 6 3 2 2 decimal places

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Count the total number of decimal places in the problem. 1.9 8 x 3. 4 7 9 2 5 9 4 0 6 6 3 2 2 decimal places +1 decimal place

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Count the total number of decimal places in the problem. 1. 9 8 x 3. 4 7 9 2 5 9 4 0 6 6 3 2 2 decimal places +1 decimal place 3 decimal places

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Put that many decimal places in the answer. 1. 9 8 x 3. 4 7 9 2 5 9 4 0 6 6 3 2 2 decimal places +1 decimal place 3 decimal places

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Put that many decimal places in the answer. 1. 9 8 x 3. 4 7 9 2 5 9 4 0 6 6 3 2 2 decimal places +1 decimal place 3 decimal places 1 decimal place

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Put that many decimal places in the answer. 1. 9 8 x 3. 4 7 9 2 5 9 4 0 6 6 3 2 2 decimal places +1 decimal place 3 decimal places 2 decimal places

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Put that many decimal places in the answer. 1. 9 8 x 3. 4 7 9 2 5 9 4 0 6.6 3 2 2 decimal places +1 decimal place 3 decimal places

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Put that many decimal places in the answer. 1. 9 8 x 3. 4 7 9 2 5 9 4 0 6.6 3 2

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Remove any extra zeros. Find the number that has the most digits NOT INCLUDING zeros on the front. Put that number on top lining up the right side of the problem. Multiply normally. Count the total decimal places in the problem. Put that many decimal places in the answer.

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