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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
5 4 6
8 5 5 ×
5 × 6 = 3 0
5 × 40 = 2 0 0
5 × 500 = 2 5 0 0
50 × 6 =
300
50 × 40 =
2000
50 × 500 =
25000
800 × 6 =
4800
800 × 40 =
32000
800 × 500 =
+ 400000
466830