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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
1 2 8
1 6 ×
6 × 8 = 4 8
6 × 20 = 1 2 0
6 × 100 = 6 0 0
10 × 8 =
80
10 × 20 =
200
10 × 100 =
1000
2048