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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
2 4 5
4 3 ×
3 × 5 = 1 5
3 × 40 = 1 2 0
3 × 200 = 6 0 0
40 × 5 =
200
40 × 40 =
1600
40 × 200 =
8000
10535