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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
3 4 3
1 2 3 ×
3 × 3 = 9
3 × 40 = 1 2 0
3 × 300 = 9 0 0
20 × 3 =
60
20 × 40 =
800
20 × 300 =
6000
100 × 3 =
300
100 × 40 =
4000
100 × 300 =
+ 30000
42189