Show:
Rounding
Estimating Sums
Estimating Differences
Finding Sums
Finding Differences
100

Round 345 to the nearest ten.

What is 350?

100

413 + 356 ESTIMATE the sum 

What is 400 + 400 = 800?

100

587 - 347 ESTIMATE

What is 600 - 300 = 300?

100

345 + 276. 

What is 521?

100

800 - 388.

What is 412?

200

Round 23,678 to the nearest hundred.

What is  23, 700?

200

4,623 + 4,313 ESTIMATE the sum

What is 5,000 + 4,000 = 9,000?

200

What is 1,686 - 118 ESTIMATE


DAILY DOUBLE

What is 2,000 - 100 = 1,900?

or

1,700 - 100 = 1,600

200

8,542 + 1,109.

What is 9,651?

200

246 - 127.

What is 119?

300

Round 7,429 to the nearest thousands.

What is 7,000?

300

5,535 + 4,234 ESTIMATE the sum

What is 6,000 + 4,000 = 10,000?

300

6,315 - 4,423 ESTIMATE

What is 6,000 - 4,000 = 2,000

300

5,283 + 4147.

What is 9,430.

300

8,919 - 5,284.

What is 3,635

400

Round 15,513 to the nearest thousand.

What is 16,000?

400

88,349 + 42,682 ESTIMATE the sum

What is 90,000 + 40,000 = 130,000?

400

66,682 - 23,224 ESTIMATE

What is 70,000 - 20,000 = 50,000?

400

61,234 + 15,678.

What is 76,912?

400

72,500 - 11,245.

What is 61,255?

500

Round 92,936 to the nearest Hundred Thousand.

What is 100,000?

500

5,331,291 + 6,335,768 ESTIMATE the sum

What is 5,000,000 + 6,000,000 = 11,000,000?

500

870,588 - 166,332 ESTIMATE

What is 900,000 - 200,000 = 700,000?

500

4,344,681 + 283,309.

What is 4,627,990

500

500,800 - 22,427.

What is 478,373