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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
3 7 7
2 6 7 ×
7 × 7 = 4 9
7 × 70 = 4 9 0
7 × 300 = 2 1 0 0
60 × 7 = 4 2 0
60 × 70 = 4 2 0 0
60 × 300 = 1 8 0 0 0
200 × 7 =
1400
200 × 70 =
14000
200 × 300 =
+ 60000
100659