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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
5 7 4
5 3 ×
3 × 4 = 1 2
3 × 70 = 2 1 0
3 × 500 = 1 5 0 0
50 × 4 =
200
50 × 70 =
3500
50 × 500 =
25000
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