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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
2 7 7
4 3 ×
3 × 7 = 2 1
3 × 70 = 2 1 0
3 × 200 = 6 0 0
40 × 7 =
280
40 × 70 =
2800
40 × 200 =
8000
11911