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3 cijfers X 2 cijfers met hulp [2]

3 cijfers X 2 cijfers met hulp [2]

 
3 8 6
4 5 ×
5 × 6 =
30
5 × 80 =
400
5 × 300 =
1500
40 × 6 =
240
40 × 80 =
3200
40 × 300 =
+ 12000
17370