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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
4 7 2
5 3 6 ×
6 × 2 = 1 2
6 × 70 = 4 2 0
6 × 400 = 2 4 0 0
30 × 2 = 6 0
30 × 70 = 2 1 0 0
30 × 400 = 1 2 0 0 0
500 × 2 =
1000
500 × 70 =
35000
500 × 400 =
+ 200000
252992