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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
4 6 5
2 8 ×
8 × 5 = 4 0
8 × 60 = 4 8 0
8 × 400 = 3 2 0 0
20 × 5 =
100
20 × 60 =
1200
20 × 400 =
8000
13020