Partial Products
Over Strategy
Doubling/Halving
5 is Half of 10
Quick Math Facts
100

9 x 12

108

100

9 x 22

198

100

12 x 15

180

100
26 x 10

260

100

4 x 6

24

200

6 x 17

102

200

9 x 46

454

200

6 x 25

150

200

5 x 17

85
200

3 x 7

21

300

4 x 29

116

300

99 x 39

3861

300

5 x 32

160

300

25 x 12

300

300

6 x 8

48

400

7 x 47

329

400

99 x 65

551

400
25 x 16

400

400

15 x 46

483

400

9 x 7

63

500

8 x 65

520

500

12 x 39

468

500

44 x 15

660

500

20 x 76

1520

500

12 x 8

96

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