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3 cijfers X 2 cijfers met hulp [2]

3 cijfers X 2 cijfers met hulp [2]

 
5 6 4
4 8 ×
8 × 4 =
32
8 × 60 =
480
8 × 500 =
4000
40 × 4 =
160
40 × 60 =
2400
40 × 500 =
+ 20000
27072