Show:
2 digit by 1 digit
3 digit by 1 digit
4 digit by 1 digit
Round and multiply
use the box method
100

23 x 4

92

100

134 x 2 

268

100

1243 x 2 

2,486

100

32 x 46

1,500

100

23 x 34

782

200

59 x 2

118

200

245 x 3 

735

200

2115 x 3 

6,345

200

27 x 62 

1,800

200

47 x 33

1,551

300

37 x 5 

185

300

316 x 5 

1,580

300

3202 x 3 

9,606

300

31 x 93

2,700

300

67 x 42

2,814

400

42 x 6

252

400

114 x 5 

570

400

5231 x 4 

20,924

400

63 x 86

5,400

400

24 x 92

2,208

500

73 x 2 

146

500

345 x 5 

1,725

500

1172 x 2 

2,344

500

11 x 34

300

500

53 x 38

2,014