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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
6 9 0
9 5 4 ×
4 × 0 = 0
4 × 90 = 3 6 0
4 × 600 = 2 4 0 0
50 × 0 = 0
50 × 90 = 4 5 0 0
50 × 600 = 3 0 0 0 0
900 × 0 =
0
900 × 90 =
81000
900 × 600 =
+ 540000
658260