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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
1 8 2
1 3 ×
3 × 2 = 6
3 × 80 = 2 4 0
3 × 100 = 3 0 0
10 × 2 =
20
10 × 80 =
800
10 × 100 =
1000
2366