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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
3 4 0
1 8 9 ×
9 × 0 = 0
9 × 40 = 3 6 0
9 × 300 = 2 7 0 0
80 × 0 =
0
80 × 40 =
3200
80 × 300 =
24000
100 × 0 =
0
100 × 40 =
4000
100 × 300 =
+ 30000
64260