Adding and subtracting decimal numbers

12 - 1.3

Estimate the answer.

Estimate the difference by rounding each number to the nearest whole number and then subtracting.

7.096 − 4.774

• 2

• 3

• 4

• 5

Estimate.  $6.36 + $6.81

• $12
• $13.17
• $13
• $6.30

Tags

Estimate Sums

Estimate the difference.

968.8 - 161

49  $+$  22.8 while rounding to the nearest ten

• 69

• 72.8

• 70

• none of the above

At the theater, the Worth family spent $25.78 on adult tickets, $19.50 on children’s tickets, and $12.75 on refreshments. About how much did they spend in all?

• $58

• $59

• $60

• $65

Stephanie runs 5 days a week. Her distances for 5 days are 2.8 miles, 3.3 miles, 3.9 miles, 4.3 miles, and 4.9 miles. Which is the best estimate for the number of miles she ran?

• 21 miles

• 12 miles

• 23 miles

• 19 miles

Estimate 5.72 - 3.55 =

• 8

• 2

• 2.17

• 15

Estimating is to....

• find the exact answer

• find something close to the correct answer

• use an algorithm

Match the best estimate to their correct problem.

• 16

• 81.3 - 9.99

• 71

• 19.88 - 4.2

• 45

• 49.6 - 5