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3 cijfers X 2 cijfers met hulp [2]

3 cijfers X 2 cijfers met hulp [2]

 
5 7 9
2 3 ×
3 × 9 =
27
3 × 70 =
210
3 × 500 =
1500
20 × 9 =
180
20 × 70 =
1400
20 × 500 =
+ 10000
13317