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3 cijfers X 3 cijfers met hulp [3]

3 cijfers X 3 cijfers met hulp [3]

 
8 5 3
3 3 6 ×
6 × 3 =
18
6 × 50 =
300
6 × 800 =
4800
30 × 3 =
90
30 × 50 =
1500
30 × 800 =
24000
300 × 3 =
900
300 × 50 =
15000
300 × 800 =
+ 240000
286608