Add and Subtract Decimals

What is the sum of 51.37 and 24.50?

• 26.87

• 7,587.00

• 75.87

What is the sum 0.04 and 9.9?

• 99.4

• 0.14

• 9.94

John has 0.75 of a pizza left and he buys another 0.25 of a pizza. How much pizza does he have now?

• 1.0

• 0.100

• 1.00

• 0.1

John has $0.66 in his pocket, and he finds another $0.134. How much money does he have now?

• 0.794

• 0.704

• 0.764

• 0.8

Ben purchased lunch today at the school cafeteria for $2.75. Before today, Ben owed $9.15 on his lunch account. What is the status of his lunch account after today?

Mathematical Equivalence

ON

-12.4 + 9.2 + 1 

Mathematical Equivalence

ON

Place the following steps for ADDING and SUBTRACTING decimals in order from the FIRST step to the LAST step!

• Drop the decimal to the answer.

• Step 4

• Fill in zero's in blank spaces.

• Step 3

• Line up decimals vertically.

• Step 2

• Add or subtract correctly.

• Step 1

What did the student incorrectly do while solving this equation?

• Subtracted instead of added the amounts together

• Nothing, the student solved the problem correctly

• Did not line up the decimal points

What word problem can be represented by 51.37 + 24.5? Hint: Read the possible answers CAREFULLY!

• Fifty-one dollars and thirty-seven cents less than Twenty-four dollars and fifty cents.

• Fifty-one dollars and thirty-seven cents more than Twenty-four dollars and fifty cents.

• Fifty-one dollars and thirty-seven cents more than Twenty-four dollars and five cents.

What is the difference between 8.97 and 2.82?

• 6.15

• 11.79

• 61.5