Add and Subtract Decimals

What is the sum of 4.45 and 5.55?

• 9.90

• 10.0

• 10.10

• 11.00

How do you check your work after adding or subtracting decimals?

• You can check your work by reversing the operation (subtracting if you added, or adding if you subtracted) to see if you return to the original numbers.

• You can check your work by rounding the numbers to the nearest whole number and then performing the operation again.

• You can check your work by multiplying the result by 10 and comparing it to the original numbers.

• You can check your work by writing the numbers in a different order and performing the operation again.

What is the place value of 0 in 3.40?

• In the tenths place

• In the hundredths place

• In the ones place

• In the thousandths place

What is 15.07 minus 12.2?

• 2.87

• 3.00

• 2.50

• 3.15

What is the sum of 1.1 and 2.9?

• 3.0

• 4.0

• 5.0

• 2.0

What is the result of 6.7 minus 2.33?

• 4.37

• 3.67

• 5.00

• 4.00

What does it mean to round a decimal?

• Adjusting its value to make it simpler while keeping it close to the original value.

• Changing the decimal to a whole number only.

• Eliminating all digits after the decimal point.

• Increasing the value of the decimal by a fixed amount.

What is the result of 10.5 minus 4.2?

• 5.1

• 6.3

• 7.2

• 8.0

What is the result of 8.5 minus 3.2?

• 5.1

• 5.3

• 6.0

• 4.8

What is the difference between 5.5 and 2.75?

• 1.5

• 2.75

• 3.25

• 2.0