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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
3 8 7
3 3 3 ×
3 × 7 = 2 1
3 × 80 = 2 4 0
3 × 300 = 9 0 0
30 × 7 = 2 1 0
30 × 80 = 2 4 0 0
30 × 300 = 9 0 0 0
300 × 7 =
2100
300 × 80 =
24000
300 × 300 =
90000
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