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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
5 7 4
3 9 ×
9 × 4 = 3 6
9 × 70 = 6 3 0
9 × 500 = 4 5 0 0
30 × 4 =
120
30 × 70 =
2100
30 × 500 =
15000
22386