问题
解答题
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答案
（1）37×20.2，
=37×（20+0.2），
=37×20+37×0.2，
=740+7.4，
=747.4；
（2）1.25×3.2×2.5，
=1.25×8×0.4×2.5，
=（1.25×8）×（0.4×2.5），
=10×1，
=10；
（3）20÷0.4÷2.5，
=20÷（0.4×2.5），
=20÷1，
=20．
搜题请搜索小程序“爱下问搜题”
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（1）37×20.2，
=37×（20+0.2），
=37×20+37×0.2，
=740+7.4，
=747.4；
（2）1.25×3.2×2.5，
=1.25×8×0.4×2.5，
=（1.25×8）×（0.4×2.5），
=10×1，
=10；
（3）20÷0.4÷2.5，
=20÷（0.4×2.5），
=20÷1，
=20．
My friend, David Smith, had pet birds. One day he called me and told me he would be 25 for a week. He asked me to feed the birds for him. Unfortunately, I did not 26 to feed the birds until the night before David was going to 27 . I ran to his house quickly and soon found the key he gave me, 28 I couldn't open the door! I kept thinking of 29 David would say when he came back. Then I found that one bedroom window was 30 . I put a big stone (石头) 31 the window, though it was very heavy. I made lots of noise, but in the end, I climbed up. I had one leg inside the bedroom when I suddenly found that 32 was shining a flashlight (手电筒) up at 33 . I looked down and 34 a policeman and an old lady, one of David's neighbors. "What are you doing up there?" asked the policeman. Feeling like a fool, I answered: "I was just going to feed Mr Smith's birds."
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