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3 cijfers X 3 cijfers met hulp [3]

3 cijfers X 3 cijfers met hulp [3]

 
1 3 6
2 4 2 ×
2 × 6 =
12
2 × 30 =
60
2 × 100 =
200
40 × 6 =
240
40 × 30 =
1200
40 × 100 =
4000
200 × 6 =
1200
200 × 30 =
6000
200 × 100 =
+ 20000
32912