SOLUTION: how to work out 89x69
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Question 754192: how to work out 89x69
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
how to work out 89x69
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89*69 = (79+10)*(79-10) = 79^2 - 10^2
= 6241 - 100
= 6141
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