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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
5 7 9
3 9 5 ×
5 × 9 = 4 5
5 × 70 = 3 5 0
5 × 500 = 2 5 0 0
90 × 9 =
810
90 × 70 =
6300
90 × 500 =
45000
300 × 9 =
2700
300 × 70 =
21000
300 × 500 =
+ 150000
228705