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3 cijfers X 2 cijfers met hulp [2]

3 cijfers X 2 cijfers met hulp [2]

 
4 3 1
5 5 ×
5 × 1 =
5
5 × 30 =
150
5 × 400 =
2000
50 × 1 =
50
50 × 30 =
1500
50 × 400 =
+ 20000
23705