Adding and Subtracting Decimals Mrs. Thomas 6th grade Math

Objectives We will learn to: add decimals subtract decimals apply adding and subtracting decimals to problem solving

To add decimals… Step 1: Write the numbers so that the decimal points line up. Visualize a place value chart to help line up the decimal points. Take 1.93 + 3.1 ones decimal point tenths hundredths thousandths 1 . 9 3 +

To add decimals… . Step 2: Add zeros as place holders if needed. 1 9 3 ones decimal point tenths hundredths thousandths 1 . 9 3 +

To add decimals… . Step 3: Add. Regroup if necessary. Write a decimal point in the answer under the decimal points in the numbers you are adding. (Basically, bring the decimal point down.) ones decimal point tenths hundredths thousandths 1 . 9 3 + 5

Now, let’s try… 0.16 + 0.31 = 0.31 + 0.62 = 0.82 + 0.17 = 0.25 + 0.13 = 0.42 + 0.11 = 0.07 + 0.33 =

Let’s try adding decimals… ones decimal point tenths hundredths thousandths . +

The same rules apply when adding 3 or more decimals ones decimal point tenths hundredths thousandths . +

To subtract decimals… . 1 5 - 6 Step 1: Write the numbers so that the decimal points line up. Visualize a place value chart to help line up the decimal points. Remember, it helps to put the larger number on top. Take 1.5 – 1.06 ones decimal point tenths hundredths thousandths 1 . 5 - 6

To subtract decimals… . Step 2: Add zeros as place holders if needed. ones decimal point tenths hundredths thousandths 1 . 5 - 6

To subtract decimals… . Step 3: Subtract. Regroup if necessary. Write a decimal point in the answer under the decimal points in the numbers you are subtracting. (Basically, bring the decimal point down.) ones decimal point tenths hundredths thousandths 1 . 5 - 6

To subtract decimals… . Step 3: Subtract. Regroup if necessary. Write a decimal point in the answer under the decimal points in the numbers you are subtracting. (Basically, bring the decimal point down.) ones decimal point tenths hundredths thousandths 1 . 4 5 10 - 6

Now, let’s try… 6.93 - 5.33 = 96.2 – 31.1 = 0.864 – 0.742 = 9.62 – 8.12 = 0.468 – 0.327 = 0.783 – 0.472 =

Let’s try subtracting decimals… ones decimal point tenths hundredths thousandths . -