August
July
May
February
December
100

0 x 100

0

100

1 x 500

500

100

200 + 55

255

100

499 - 400

99

100

520 + 100

620

200

123 + 349

472

200

654 - 321

333

200

369 + 135

504

200

987 - 321

666

200

654 - 379

275

300

3 x 4

12

300

5 x 2

10

300

3 x 5

15

300

4 x 2

8

300

6 x 2

12

400

6 x 7

42

400

7 x 4

28

400

5 x 7

35

400

6 x 6

36

400
7 x 7

49

500

___ + 80 = 145

65

500

80 - ___ = 45

35

500

200 x ___= 0

0

500

1000 x ___ = 1000

1

500

1 x 1 x 1

1

M
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u