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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
3 3 1
2 1 ×
1 × 1 = 1
1 × 30 = 3 0
1 × 300 = 3 0 0
20 × 1 =
20
20 × 30 =
600
20 × 300 =
6000
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