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3 cijfers X 2 cijfers met hulp [2]

3 cijfers X 2 cijfers met hulp [2]

 
1 2 5
1 1 ×
1 × 5 =
5
1 × 20 =
20
1 × 100 =
100
10 × 5 =
50
10 × 20 =
200
10 × 100 =
+ 1000
1375