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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
 
1 9 7
1 8 ×
8 × 7 = 5 6
8 × 90 = 7 2 0
8 × 100 = 8 0 0
10 × 7 =
70
10 × 90 =
900
10 × 100 =
1000
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