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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
2 6 0
2 6 1 ×
1 × 0 = 0
1 × 60 = 6 0
1 × 200 = 2 0 0
60 × 0 = 0
60 × 60 = 3 6 0 0
60 × 200 = 1 2 0 0 0
200 × 0 =
0
200 × 60 =
12000
200 × 200 =
+ 40000
67860