Q. A large department store has 4 boxes of socks. There are 121 pairs of socks in every box. How many pairs of socks do they have to sell?
A. 484. Because.....
4 x 100 = 400
4 x 20 = 80
Which equals, 480. (Keep that in your head)
4 x 1 = 4 + 480 = 484
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