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3 cijfers X 2 cijfers met hulp [2]

3 cijfers X 2 cijfers met hulp [2]

 
1 4 8
1 2 ×
2 × 8 =
16
2 × 40 =
80
2 × 100 =
200
10 × 8 =
80
10 × 40 =
400
10 × 100 =
+ 1000
1776