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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
1 1 5
1 7 ×
7 × 5 = 3 5
7 × 10 = 7 0
7 × 100 = 7 0 0
10 × 5 =
50
10 × 10 =
100
10 × 100 =
1000
1955