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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
5 9 9
7 4 5 ×
5 × 9 = 4 5
5 × 90 = 4 5 0
5 × 500 = 2 5 0 0
40 × 9 =
360
40 × 90 =
3600
40 × 500 =
20000
700 × 9 =
6300
700 × 90 =
63000
700 × 500 =
+ 350000
446255