Question

EASY WORK !!!!!

Directions: Estimate the sum or difference of each problem. The first one is done for you.

Tip: Round the numbers to the nearest 10 before estimating the sum or difference.

1) 28 + 53=

First, look at the second digit in the number. If it is 5 or higher, round the first digit up. If it is 4 or lower, leave the first digit as it is.

28 = 30

53 = 50

30 + 50 = 80

2) 58 + 31=

3) 73 + 45=

4) 37 + 44=

5) 66 - 21=

6) 53 - 50=

7) 51 - 16=

8) 20 - 11=

9) 86 + 6=

10) 94 + 87=

Answer 1

1) 80

2) 90

3) 120

4) 80

5) 50

6) 5

7) 35

8) 10

9) 90

10) 180

Explanation:

Answer 2

1) 80

2) 90

3) 120

4) 80

5) 50

6) 5

7) 35

8) 10

9) 90

10) 180

Explanation:

:o