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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
5 9 2
5 1 ×
1 × 2 = 2
1 × 90 = 9 0
1 × 500 = 5 0 0
50 × 2 =
100
50 × 90 =
4500
50 × 500 =
25000
30192