Rounding
Estimating
Adding Decimals
Subtracting Decimals
Place Value
100

Round the number to the nearest tens place


347



350

100

30+22

52

100

4.05 + 2.1

6.15

100

0.99 - 0.10

0.89

100

What digit is in the tens place and what is its value?

123.45


digit: 2

value: 20

200

Round the number to the nearest tenths place.


10.245


10.2

200

30.12 + 3.2

About 33

200

3.77 + 4.66

8.43

200

1.50 - 1.25 = ?

0.25

200

What digit is in the hundredths place? What is its value?

4.56

digit: 6

value: 6 hundredths, 0.06

300
Round the number to the nearest hundredths place.


9.145

9.15

300

9.7 + 17.3

About 27

300

12.68 + 31.91

44.59

300

7.8 - 2.5 = ?

5.3

300

What digit it in the ones place?

432.001

digit: 2

value: 2

400

Round the number to the nearest hundredths place.

89.941


89.94

400

34.8 + 4.9

About 40

400

True or False:

67.8 + 14.75 = 215.3

False

400

10.01 - 4.6 = ?

5.41

400

What is the value of the digit in the tenths place?

45.49

digit: 4

value: 4 tenths, 0.4


500

Round the number to the nearest hundredths place.

152.893

500

80.01 + 2.89

About 83

500

101.92 + 17.4

119.32

500

82.99 - 4.54 = ?

78.45

500

True or False:

The value of the digit in the hundredths place is 72 hundredths

39.72

False. 

The value of the digit in the hundredths place is 2 hundredths, or 0.02.