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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
5 4 2
5 5 ×
5 × 2 = 1 0
5 × 40 = 2 0 0
5 × 500 = 2 5 0 0
50 × 2 =
100
50 × 40 =
2000
50 × 500 =
25000
29810