What is the combined area, in square inches,of the front and back of a rectangular sheet of paper measuring 17/2 inches by 11 inches?
thanks a loooooooooooooooooot...........
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应该是长17/2 inches 宽 11 inches的纸正反面加起来面积多少。
2*17/2*11=181,有这个答案吗?
是187吧。答案算错了。
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