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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
5 2 9
5 1 ×
1 × 9 = 9
1 × 20 = 2 0
1 × 500 = 5 0 0
50 × 9 =
450
50 × 20 =
1000
50 × 500 =
25000
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