简便运算:9.42*10-94.2*0.9 3.61/(7.2-5.3)*25
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简便运算:9.42*10-94.2*0.9 3.61/(7.2-5.3)*25
![简便运算:9.42*10-94.2*0.9 3.61/(7.2-5.3)*25](/uploads/image/z/5654457-9-7.jpg?t=%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%EF%BC%9A9.42%2A10-94.2%2A0.9+3.61%2F%EF%BC%887.2-5.3%EF%BC%89%2A25)
9.42*10-94.2*0.9
=94.2-94.2*0.9
=94.2*(1-0.9)
=94.2*0.1
=9.42
3.61/(7.2-5.3)*25
=3.61/1.9*25
=1.9*25
=(2-0.1)*25
=2*25-0.1*25
=50-2.5
=47.5
再问: 第二题好乱啊~ 请重新写一下
再答: 3.61/(7.2-5.3)*25 =3.61/1.9*25 =1.9*25 =(2-0.1)*25 =2*25-0.1*25 =50-2.5 =47.5
再问: 2.4*1.5+3.6/1.5 怎么算
再答: 2.4*1.5+3.6/1.5 =2.4*1.5+2.4 =2.4*(1.5+1) =2.4*2.5 =6
=94.2-94.2*0.9
=94.2*(1-0.9)
=94.2*0.1
=9.42
3.61/(7.2-5.3)*25
=3.61/1.9*25
=1.9*25
=(2-0.1)*25
=2*25-0.1*25
=50-2.5
=47.5
再问: 第二题好乱啊~ 请重新写一下
再答: 3.61/(7.2-5.3)*25 =3.61/1.9*25 =1.9*25 =(2-0.1)*25 =2*25-0.1*25 =50-2.5 =47.5
再问: 2.4*1.5+3.6/1.5 怎么算
再答: 2.4*1.5+3.6/1.5 =2.4*1.5+2.4 =2.4*(1.5+1) =2.4*2.5 =6