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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
1 4 1
2 8 2 ×
2 × 1 = 2
2 × 40 = 8 0
2 × 100 = 2 0 0
80 × 1 = 8 0
80 × 40 = 3 2 0 0
80 × 100 = 8 0 0 0
200 × 1 =
200
200 × 40 =
8000
200 × 100 =
+ 20000
39762