Decimal Computations
Place Value
Estimation
Fractions : + and -
Fractions : x and ÷
100

52.8 + 2.95

55.75

100

What is the value of the 7 in: 37,492.51

7 thousand

100

Round 35.97 to the nearest tenth

36

100

What is the least common denominator for:

1 and 4/5 + 2 and 3/4

20

100

3/5 x 2/3 =

6/15

200

459.1 - 32.49

426.61

200

What place is the 4 in: 59.04

hundredths

200

Name two of the three estimation strategies

Rounding, front-end, and close-to/easy numbers

200

4 and 3/10 + 3 and 7/10 = 

8

200

1/3 ÷ 5/6

6/15

300

3.4 x 1.5

5.1

300

>,<,= : 

6.891 _ 13.2

<

300

Round to the nearest whole and divide

54.32 ÷ 9.24

6

300

1 and 4/5 + 2 and 3/4 =

3 and 31/20 or 4 and 11/20

300

1 and 2/3 x 4/9

20/27

400

14.2 x 7.91

112.322

400

<,>, = :

45.00 _ 45

=

400

Estimate the decimal placement

53.21 x 23.6 = 1255756

1,255.756

400

2 and 5/6 - 1 and 2/6 = 

1 and 3/6 or 1 and 1/2

400

2 and 3/5 x 1/2 = 

18/10 or 1 and 8/10 or 1 and 4/5

500

86.4 ÷ 3.6

24

500

5.982 x 10? = 598.2

Find the exponent

2
500

Estimate the decimal placement

301.537 ÷ 0.62 = 48635

486.35

500

2 and 1/3 - 1 and 3/7 =

19/21

500

21÷3+(3+4)-6x2=

2

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