Gr. 4/5 - Addition and Subtraction

Mental Math

100

Double points:

2 + 2

4

200

25 + 14

39

300

47 - 23

24

400

783 + 116

899

500

1756 - 756

1000

4 by 3 +

100

4000 + 300

4300

200

Double points:

9500 + 400

9900

300

6500 + 350

6850

400

9750 + 249 

9999

500

9457 + 633

10090

5 by 4 +

100

40000 + 5000

45000

200

73000 + 4000

77000

300

Double points:

65400 + 2300

67700

400

15340 + 4337

19677

500

95247 + 3249

98496

4 by 3 -

100

Double points

1000 - 300

700

200

4600 - 200

4400

300

3542 - 432

3110

400

4579 - 251

4328

500

5947 - 724

5223

5 by 4 -

100

40000-5000

35000

200

73000 -2000

71000

300

65400 - 2300

63100

400

15340 - 4337

11003

500

Double points:

56500 - 6423

50077