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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
3 5 0
3 2 8 ×
8 × 0 = 0
8 × 50 = 4 0 0
8 × 300 = 2 4 0 0
20 × 0 =
0
20 × 50 =
1000
20 × 300 =
6000
300 × 0 =
0
300 × 50 =
15000
300 × 300 =
+ 90000
114800