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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
4 5 9
5 3 ×
3 × 9 = 2 7
3 × 50 = 1 5 0
3 × 400 = 1 2 0 0
50 × 9 =
450
50 × 50 =
2500
50 × 400 =
20000
24327