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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
1 7 9
1 5 4 ×
4 × 9 = 3 6
4 × 70 = 2 8 0
4 × 100 = 4 0 0
50 × 9 = 4 5 0
50 × 70 = 3 5 0 0
50 × 100 = 5 0 0 0
100 × 9 =
900
100 × 70 =
7000
100 × 100 =
+ 10000
27566