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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
2 6 2
2 9 7 ×
7 × 2 = 1 4
7 × 60 = 4 2 0
7 × 200 = 1 4 0 0
90 × 2 =
180
90 × 60 =
5400
90 × 200 =
18000
200 × 2 =
400
200 × 60 =
12000
200 × 200 =
+ 40000
77814