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3 cijfers X 2 cijfers met hulp [2]

3 cijfers X 2 cijfers met hulp [2]

 
1 4 7
1 4 ×
4 × 7 =
28
4 × 40 =
160
4 × 100 =
400
10 × 7 =
70
10 × 40 =
400
10 × 100 =
+ 1000
2058