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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
4 6 2
3 7 ×
7 × 2 = 1 4
7 × 60 = 4 2 0
7 × 400 = 2 8 0 0
30 × 2 =
60
30 × 60 =
1800
30 × 400 =
12000
17094