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3 cijfers X 3 cijfers met hulp [3]

3 cijfers X 3 cijfers met hulp [3]

 
3 8 7
4 1 6 ×
6 × 7 =
42
6 × 80 =
480
6 × 300 =
1800
10 × 7 =
70
10 × 80 =
800
10 × 300 =
3000
400 × 7 =
2800
400 × 80 =
32000
400 × 300 =
+ 120000
160992