Show:
Round to the nearest 10
Round to the nearest 100
Addition
Subtraction
1

73 to the nearest 10

70

1

472 to the nearest 100

500

1

Solve using base ten blocks

251 + 236 =

487

1

Solve using base ten blocks

746 - 263

483

2

27 to the nearest 10

30

2

732 to the nearest 100

700

2
Solve using a number line

574 + 252

826

2

Solve using a number line

573 - 326

247

3

45 to the nearest 10

50

3

350 to the nearest 100

400

3

Solve using adjusting

302 + 467 =

302 + 467 =

  - 2     +2

300 + 469 = 769

3

Solving using any strategy

843 - 391

452

4

89 to the nearest 10

90

4

213 to the nearest 100

200

4

Solve using any strategy

639 + 215

854

4
Solve using partial differences (break apart)


761 - 437

324

5

13 to the nearest 10

10

5

387 to the nearest 100

400

5

Solve using partial sums (break apart)

365 + 238 =

300 + 200 = 500

60 + 30 = 90

5 + 8 = 13

500 + 90 + 13 = 603

5

Solve using any strategy

512 - 254

258