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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
3 7 3
1 9 3 ×
3 × 3 = 9
3 × 70 = 2 1 0
3 × 300 = 9 0 0
90 × 3 = 2 7 0
90 × 70 = 6 3 0 0
90 × 300 = 2 7 0 0 0
100 × 3 =
300
100 × 70 =
7000
100 × 300 =
+ 30000
71989