Adding and subtracting Decimals

What is the rule for adding or subtracting decimals?

• Add first

• Line up the decimals first, then fill in with zeros.

• Move the decimal to the right the total amount of numbers after the decimal.

• Subtract

5.4 + 0.5 =

• 4.5

• 4.9

• 5.9

• 5.8

7.2 - 4.3 =

• 2.9

• 3.9

• 3.1

• 2.1

9.7 - 3.2 =

• 6.5

• 12.9

• 65

• 1.29

8.4 - 3.1 =

• 5.35

• 5.3

• 5.4

• 4.3

5.6 + 4.2 =

• 9.6

• 9.8

• 9.2

• 1.4

6.70 - 2.33 =

• 4.43

• 4.4

• 4.37

• 4.47

15.3 - 12.2 =

• 3.1

• 31

• 3.01

• 27.5

7.1 - 4.4 =

• 2.7

• 3.7

• 3.6

• 2.5

3.3 + 2.22=

• 5.52

• 5.55

• 5.77

• 5.4