4 Comparing Decimals Line up the decimals vertically. Start at the left and compare corresponding digits. If the digits are the same, move one place to the right.When two digits are different, the larger number is the one with the larger value.
5 Example: Comparing Decimals List from Smallest to Largest1.834, 1.83, 1.381, 1.38, 1.8Answer:1.38,1.381,1.8,1.83,1.8341.8341.831.3811.381.800
6 Example 2: Compare Decimals List from smallest to largest15.002, 15.02, , ,Answer:15.00215.0215.00115.01815.001,,15.002,15.018,15.020 0
7 Rounding DecimalsCircle the digit value to round to, and draw an arrow to the number to the rightIf the value is 5 or greater, round the digit value up oneIf the value is less than 5, drop the values to right of digit
8 Example: Rounding Decimal Round to the nearest hundredths5 or Greater? NoThen drop values137.89Round to the nearest thousandth0.39
9 Examples: More on rounding Round to the nearest whole number. This is the same thing as rounding to the nearest ones place.9.0 or 9or 495
10 Adding and Subtracting Decimals Write the numbers to be added vertically and line up the decimal points. Extra zeros may be placed to the right of the decimal points if needed.Add or subtract all the digits with the same place value, starting with the right column and moving to the left.Place the decimal point of the sum or difference in line with the decimal points of the numbers added.
14 Multiplying Decimals Steps Set up in multiplying form – don’t worry about lining up decimals or trailing zerosMultiplyCount decimals places in both multiplied numbersMove decimal point in final answer
16 More Examples on Multiplication Step 1Step 2Step 35.26145263052104402367455.26145xx+
17 Dividing a Decimal by a Whole Number Set up the division problemPlace the decimal point for the quotient directly above the decimal point in the dividend.Then, divide if the numbers were whole numbers.Validate by multiplication.
18 Dividing by a Whole Number The decimal points are aligned, one above the other.2.16.1612848Divide as you normally divide whole numbers.
19 Dividing by a DecimalWhen dividing a decimal by another decimal, the division problem is converted into an equivalent problem that has a whole number as a divisor.Dividing by a DecimalMake the divisor a whole number by moving the decimal point to the right. Mark that position with a caret (). Count the number of places the decimal point moved.Move the decimal point in the dividend to the right the same number of places. Mark that position with a caret.Place the decimal point of your answer directly above the caret marking the point of the dividend.Divide as with whole numbers.
20 Dividing by a Decimal 2.3 366 549 Example: Divide 4.209 ÷ 1.83. . . . Move each decimal point to the right two places...Place the decimal point of the answer directly above the caret.2.3.Mark the new position by a caret ().366549Divide as normal.
21 Dividing by a Whole Number Example:Divide ÷ 7 and round to the nearest hundredths.37.688Carry out the division to the thousandths place, and then round.An extra zero was added to carry out the division to the required place.2153494842625660is rounded to (the nearest hundredths).Note that the remainder is not zero.
22 Order of Operations 0.3 x 0.5 + ( 0.4x 0.4x 0.4) – 0.036 – 0.0360.1500.1500.214-0.036Validate0.0360.1780.2140.1780.214