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3 cijfers X 2 cijfers met hulp [2]

3 cijfers X 2 cijfers met hulp [2]

 
5 8 9
3 8 ×
8 × 9 =
72
8 × 80 =
640
8 × 500 =
4000
30 × 9 =
270
30 × 80 =
2400
30 × 500 =
+ 15000
22382