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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
5 4 7
6 4 6 ×
6 × 7 = 4 2
6 × 40 = 2 4 0
6 × 500 = 3 0 0 0
40 × 7 = 2 8 0
40 × 40 = 1 6 0 0
40 × 500 = 2 0 0 0 0
600 × 7 =
4200
600 × 40 =
24000
600 × 500 =
+ 300000
353362