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3 cijfers X 3 cijfers met hulp [3]

3 cijfers X 3 cijfers met hulp [3]

 
3 2 4
3 7 2 ×
2 × 4 =
8
2 × 20 =
40
2 × 300 =
600
70 × 4 =
280
70 × 20 =
1400
70 × 300 =
21000
300 × 4 =
1200
300 × 20 =
6000
300 × 300 =
+ 90000
120528