问题
解答题
一间教室，长为8m，宽为6m，高为3.5m，每平方米粉刷费2.5元，粉刷这间教室需要多少钱？（注：门窗黑板面积约25平方米）
答案
8×6+8×3.5×2+6×3.5×2-25，
=48+56+42-25，
=121（平方米），
2.5×121=302.5（元），
答：粉刷这间教室需要302.5元钱．
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一间教室，长为8m，宽为6m，高为3.5m，每平方米粉刷费2.5元，粉刷这间教室需要多少钱？（注：门窗黑板面积约25平方米）
8×6+8×3.5×2+6×3.5×2-25，
=48+56+42-25，
=121（平方米），
2.5×121=302.5（元），
答：粉刷这间教室需要302.5元钱．
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| One day, a young man asked Albert Einstein, 1 great German scientist, 2 the secret (秘密) of success (成功) was.The scientist 3 him that the secret of success is hard work. A few days 4 the young man asked him the 5 question again. Einstein was very 6 . He did not say 7 , but wrote a few 8 on a piece of paper and 9 it to the young man. The young man looked 10 the piece of paper. On it was 11 : A=X+Y+Z." What 13 this mean?" asked the young man."A means success," 14 the old scientist."X means hard work, Y means good methods (方法), and Z…Z mean 59 talking and start to 15 ." | ||||
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