Rounding Decimals and Estimation

Which of the following is 4.5 when rounded to the nearest tenth?

• 4.34

• 4.44

• 4.52

• 4.61

What is $7.86 rounded to the nearest ten cents?

• $7.80

• $7.85

• $7.90

• $8.00

Round $3.41 to the nearest dollar.

• $4.00

• $3.40

• $3.00

• $2.00

Estimate:
8.2 + 7.8

• 17

• 15

• 16

• 19

Estimate:
9.89 - 7.92

• 3

• 1

• -2

• 2

Dylan wants to buy a book for $16.95 and a magazine for $4.50. About how much will he need to buy the items?

• $15

• $30

• $25

• $20

Estimate by rounding each factor to the nearest whole number.
6 x 5.8 = __________

• 30

• 34.8

• 40

• 36

Estimate by rounding each factor to the nearest whole number.  
9.07 X 3.33 = _______

• 27

• 40

• 36

• 30.2031

Estimate by rounding each factor to the nearest whole number.  
21.11 ÷ 6.73 =  ___________

• 3.5

• 3

• 3.6

• 4

Use compatible numbers to estimate the product or quotient.  
19.57 X 4.86

• 95

• 76

• 100

• 94