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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
3 1 9
2 2 7 ×
7 × 9 = 6 3
7 × 10 = 7 0
7 × 300 = 2 1 0 0
20 × 9 =
180
20 × 10 =
200
20 × 300 =
6000
200 × 9 =
1800
200 × 10 =
2000
200 × 300 =
+ 60000
72413