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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
3 5 0
2 9 7 ×
7 × 0 = 0
7 × 50 = 3 5 0
7 × 300 = 2 1 0 0
90 × 0 = 0
90 × 50 = 4 5 0 0
90 × 300 = 2 7 0 0 0
200 × 0 =
0
200 × 50 =
10000
200 × 300 =
+ 60000
103950