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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
8 6 5
9 9 4 ×
4 × 5 = 2 0
4 × 60 = 2 4 0
4 × 800 = 3 2 0 0
90 × 5 =
450
90 × 60 =
5400
90 × 800 =
72000
900 × 5 =
4500
900 × 60 =
54000
900 × 800 =
+ 720000
859810