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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
2 2 2
2 9 6 ×
6 × 2 = 1 2
6 × 20 = 1 2 0
6 × 200 = 1 2 0 0
90 × 2 =
180
90 × 20 =
1800
90 × 200 =
18000
200 × 2 =
400
200 × 20 =
4000
200 × 200 =
+ 40000
65712