Rounding
Estimating Sums
Estimating Differences
Finding Sums
Finding Differences
100

Round 345 to the nearest ten.

What is 350?

100

413 + 356 rounded to the nearest hundred.  

What is 400 + 400 = 800?

100

587 - 347 rounded to the nearest hundred.

What is 600 - 300 = 300?

100

345 + 276. 

What is 521?

100

883 - 388.

What is 495?

200

Round 678 to the nearest hundred.

What is 700?
200

523 + 413 rounded to the nearest hundred.

What is 500 + 400 = 700?

200

What is 186 - 118 rounded to the nearest hundred.

What is 200 - 100 = 100?

200

542 + 109.

What is 651?

200

246 - 127.

What is 119?

300

Round 7,429 to the nearest hundred.

What is 7,400?

300

535 + 234 rounded to the nearest hundred.

What is 500 + 200 = 700?

300

615 - 523 rounded to the nearest hundred.

What is 600 - 500 = 100

300

283 + 147.

What is 430.

300

919 - 284.

What is 635?

400

Round 15,513 to the nearest thousand.

What is 16,000?

400

349 + 682 rounded to the nearest hundred.

What is 300 +700 = 1,000?

400

682 - 224 rounded to the nearest ten.

What is 680 - 220 = 460?

400

1,234 + 5,678.

What is 6,912?

400

2,500 - 1,245.

What is 1,255?

500

Round 12,936 to the nearest ten.

What is 12,940?

500

1,291 + 3,768 rounded to the nearest thousand.

What is 1,000 + 4,000 = 5,000?

500

3,588 - 1,332 rounded to the nearest thousand.

What is 4,000 - 1,000 = 3,000?

500

4,681 + 3,309.

What is 7,990?

500

5,800 - 2,427.

What is 3,373?