早教吧作业答案频道 -->数学-->
计算可以简算的简算178/(17.8*4)1*4/9+1/4/98*4/5+8*11/55/2-(3/2+4/529.1*18.1+29.1*81.91.01*994.2*99+4.2101*1/5-1/5*21
题目详情
▼优质解答
答案和解析
计算可以简算的简算
178/(17.8*4)
=178/17.8/4
=10/4
=2.5
1* 4/9 +1/ 4/9
=4/9+9/4
=97/36
8*4/5+8*11/5
=8*(4/5+11/5)
=8*3
=24
5/2-(3/2+4/5)
=5/2-3/2-4/5
=1-4/5
=1/5
29.1*18.1+29.1*81.9
=29.1*(18.1+81.9)=29.1*100
=2910
1.01*99
=99+0.01*99
=99+0.99
=99.99
4.2*99+4.2
=4.2*(99+1)
=4.2*100
=420
101*1/5-1/5*21
=(101-21)*1/5
=80*1/5
=16
178/(17.8*4)
=178/17.8/4
=10/4
=2.5
1* 4/9 +1/ 4/9
=4/9+9/4
=97/36
8*4/5+8*11/5
=8*(4/5+11/5)
=8*3
=24
5/2-(3/2+4/5)
=5/2-3/2-4/5
=1-4/5
=1/5
29.1*18.1+29.1*81.9
=29.1*(18.1+81.9)=29.1*100
=2910
1.01*99
=99+0.01*99
=99+0.99
=99.99
4.2*99+4.2
=4.2*(99+1)
=4.2*100
=420
101*1/5-1/5*21
=(101-21)*1/5
=80*1/5
=16
看了 计算可以简算的简算178/(...的网友还看了以下: