Longest side

The price of an item is reduced by 20% in a sale. Two weeks later the price is increased to 20% more than the sale price. Do you think that the item has been restored to its original price?

Answer ONE of the following: 1. A student wanted to estimate 21.5 × 0.0079 by first rounding each number. He solved the problem as follows: 21.5 × 0.0079 is approximately equal to 20 × 0.008, which is equal to 0.016. So he estimated the answer as 0.016. Do you agree with the answer? If not, […]

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