Adding and Subtracting Decimals Review

True/False

100

When adding and subtracting decimals, you always include the decimals.

True

200

When adding and subtracting decimals, you always put the longer number on top.

False

300

When adding and subtracting decimals, you ignore the decimal points.

False

400

When adding and subtracting decimals you put the bigger number on top.

True

500

When adding and subtracting decimals, you count how many numbers are behind the decimals in the problem and put that in your answer.

False! 

Adding Decimals

100

3.1 + 5.1 = 

What is 8.2?

200

14.7+15.1=

What is 29.8?

300

3 + 4.5=

What is 7.5?

400

17.82 + 3.66=

What is 21.48?

500

11.7 + 2.81=

What is 14.51?

Subtracting Decimals

100

20.8 - 7.3=

What is 13.5?

200

34.6 - 27.9=

What is 6.7?

300

15.2- 0.4=

What is 14.8?

400

6 - 2.3=

What is 3.7?

500

1124.9 - 567.80=

What is 557.1?

place value

100

3.49

what is the place value of the 4?

4 tenths

200

1.356

What place value is the 1 on?

1 whole

300

4.346

What place value is the 6 in?

6 thousandths 

400

123.53

What place value is the 2 in?

tens place making 20

500

18294.372

What place value in 1 in?

10,000

Rounding

100

Round to the nearest whole number? 

12.43

12

200

Round to the nearest 0.1 (tenth)

284.453

284.5

300

round to the nearest .01 (hundredth)

802.025

802.03

400

Round to the nearest 0.001 (thousandth)

90.093

90.090