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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
3 1 1
5 1 ×
1 × 1 = 1
1 × 10 = 1 0
1 × 300 = 3 0 0
50 × 1 =
50
50 × 10 =
500
50 × 300 =
15000
15861