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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
3 2 2
1 3 2 ×
2 × 2 = 4
2 × 20 = 4 0
2 × 300 = 6 0 0
30 × 2 = 6 0
30 × 20 = 6 0 0
30 × 300 = 9 0 0 0
100 × 2 =
200
100 × 20 =
2000
100 × 300 =
+ 30000
42504