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10s
100s
Addition
Subraction
Mental Math
100

What is 387 rounded to the nearest 10?

390

100

What is 478 rounded to the nearest 100?

500

100

78 + 189 = ?

Round to the nearest 10 and solve.

80 + 190 = 270

100

175 - 56 = ?

Round to the nearest 10 and solve.

180 - 60 = 120

100

26 + 73 = ?

99

200

What is 689 rounded to the nearest 10?

690

200

What is 321 rounded to the nearest 100?

300

200

356 + 289 = ?

Round to the nearest 100 and solve.

400 + 300 = 700

200

678 - 365 = ?

Round to the nearest 100 and solve.

700 - 400 = 300

200

82 - 61 = ?

21

300

What is 532 rounded to the nearest 10?

530

300

What is 758 rounded to the nearest 100?

800

300

578 + 932 = ?

Round to the nearest 10 and solve.

580 + 930 = 1,510

300

837 - 725 = ?

Round to the nearest 10 and solve.

840 - 730 = 110

300

673 + 243 = ?

916

400

What is 476 rounded to the nearest 10?

480

400

What is 635 rounded to the nearest 100?

600

400

831 + 235 = ?

Round to the nearest 10 and solve.

830 + 240 = 1,070

400

998 - 889 = ?

Round to the nearest 10 and solve.

1,000 - 890 = 110

400

463 + 857 = ?

1,320

500

What is 99,473 rounded to the nearest 10?

99,470

500

What is 2,378,435 rounded to the nearest 100?

2,378,400

500

3,892 + 7,389 = ?

Round to the nearest 10 and solve.

3,890 + 7,390 = 11,280

500

9,674 - 2,736 = ?

Round to the nearest 10 and solve.

9,670 - 2,740 = 6,930

500

5,482 + 7,421 = ?

12,903