Sums and Differences

Round to the nearest hundred, then estimate the difference:

642 − 137

• 600

• 780

• 500

• 510

Round to the nearest ten thousand, then estimate the difference:

47,623 - 12,385 =

• 40

• 34,238

• 40,000

• 30,000

Round to the nearest ten thousand, then estimate the difference:

887,167 - 342,208 =

• 500,000

• 554,000

• 545,959

• 550,000

Round to the nearest thousand, then estimate the difference:

98,412 - 45,802

• 53,000

• 51,000

• 52,000

• 51,872

Round to the nearest thousand, then estimate the sum:

2,764 + 4,851

• 7,000

• 6,000

• 5,000

• 8,000

• 400 + 200 = 600
• 500 + 200 = 600
• 500 + 200 = 700
• 400 + 200 = 700

300 - 100 = 400

200 - 100 = 100

300 - 100 = 200

300 + 100 = 400

• 300 - 100 = 400

• 200 - 100 = 100

• 300 - 100 = 200

• 300 + 100 = 400

Estimate the sum of 37+91 by rounding to the nearest tens

• 120

• 150

• 130

• 140

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

• 110

• 100

• 111

• 90

Round to the nearest ten to estimate the difference.
61 - 23 = 

• 40

• 80

• 30

• 90