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3 cijfers X 3 cijfers met hulp [3]

3 cijfers X 3 cijfers met hulp [3]

 
3 2 3
9 2 3 ×
3 × 3 =
9
3 × 20 =
60
3 × 300 =
900
20 × 3 =
60
20 × 20 =
400
20 × 300 =
6000
900 × 3 =
2700
900 × 20 =
18000
900 × 300 =
+ 270000
298129