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3 cijfers X 2 cijfers met hulp [1]

3 cijfers X 2 cijfers met hulp [1]

 
1 1 9
1 5 ×
5 × 9 = 4 5
5 × 10 = 5 0
5 × 100 = 5 0 0
10 × 9 =
90
10 × 10 =
100
10 × 100 =
1000
1785