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3 cijfers X 2 cijfers met hulp [2]

3 cijfers X 2 cijfers met hulp [2]

 
1 3 9
1 5 ×
5 × 9 =
45
5 × 30 =
150
5 × 100 =
500
10 × 9 =
90
10 × 30 =
300
10 × 100 =
+ 1000
2085