Addition
Addition
Multiplication
Multiplication
Hard Multiplication
100

2+2

4

100

20+30

50

100

2x1

2

100

3x3

9

100

50x9

450

200

90+90

180

200

120+240

603

200

2x2

4

200

9x9

81

200

10x60

600

300

90+45

135

300

50+40

90

300

2x3

6

300

81x81

6561

300

10x70

700

400

20+20

40  

400

70+120

190

400

 2x4

8

400

7x37

259

400

11x234

2574

500

50+70

120

500

57+72

129

500

2x5

10

500

78x23

1794

500

182x345

62790

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