Five is Half of Ten
Fifty is Half of 100
Partial Products
Over Strategy
Doubling and Halving
Any Strategy
100

5 xx 23

115

100

50xx24

1,200

100

6xx15

90

100

9xx26

234

100

4xx26

104

100

47xx32

1,504

200

5 xx 37

185

200

50xx36

1,800

200

11xx25

275

200

9xx39

351

200

14xx25

350

200

63xx25

1,575

300

5 xx 45

225

300

50xx43

2,150

300

23xx40

920

300

99xx68

6,732

300

25xx36

900

300

91xx48

4,368

400

5 xx63

315

400

50xx67

3,350

400

25xx33

825

400

99xx74

7,326

400

32xx45

1,440

400

56xx73

4,088

500

5xx203

1015

500

50xx270

13,500

500

51xx51

2,601

500

299xx36

10,764

500

63xx40

2,520

500

599xx48

28,752

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