Estimating Addends to Find the Sum

1.Estimate the sum: 43+22

• 55

• 50

• 60

• 20

2. Estimate the sum: 123 + 456

• 580

• 650

• 500

• 600

3. Estimate the sum:

2,764 + 4,851

• 7,000

• 5,000

• 6,000

• 8,000

Estimate the sum of 52+59 by rounding to the nearest tens

• 110
• 100
• 111
• 90

Estimate the sum of 120+190 by rounding to the nearest hundreds

• 100
• 200
• 0
• 300

Estimate the sum of 327+431 by rounding to the nearest hundreds

• 700
• 600
• 758
• 800

10+7=

• 14

• 13

• 17

• 16

563 + 435

• 998

• 567

• 999

66 + 25

• 91

• 90

• 81

84 + 45

• 139

• 129

• 169