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3 cijfers X 3 cijfers met hulp [3]

3 cijfers X 3 cijfers met hulp [3]

 
3 7 8
3 1 2 ×
2 × 8 =
16
2 × 70 =
140
2 × 300 =
600
10 × 8 =
80
10 × 70 =
700
10 × 300 =
3000
300 × 8 =
2400
300 × 70 =
21000
300 × 300 =
+ 90000
117936