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3 cijfers X 2 cijfers met hulp [2]

3 cijfers X 2 cijfers met hulp [2]

 
4 5 8
5 9 ×
9 × 8 =
72
9 × 50 =
450
9 × 400 =
3600
50 × 8 =
400
50 × 50 =
2500
50 × 400 =
+ 20000
27022