几道简便运算题(5-0.2)*3.9+4.8*(4+2.1)166+978 4/7÷4216÷30*25(1/3*1/8)*(3*8)1/12*2/3+1/12*1/30.25*1/5+1/4*0.87.2*5.8+0.72*42请列过程
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![几道简便运算题(5-0.2)*3.9+4.8*(4+2.1)166+978 4/7÷4216÷30*25(1/3*1/8)*(3*8)1/12*2/3+1/12*1/30.25*1/5+1/4*0.87.2*5.8+0.72*42请列过程](/uploads/image/z/631183-31-3.jpg?t=%E5%87%A0%E9%81%93%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%E9%A2%98%EF%BC%885-0.2%EF%BC%89%2A3.9%2B4.8%2A%EF%BC%884%2B2.1%EF%BC%89166%2B978+4%2F7%C3%B74216%C3%B730%2A25%EF%BC%881%2F3%2A1%2F8%EF%BC%89%2A%EF%BC%883%2A8%EF%BC%891%2F12%2A2%2F3%2B1%2F12%2A1%2F30.25%2A1%2F5%2B1%2F4%2A0.87.2%2A5.8%2B0.72%2A42%E8%AF%B7%E5%88%97%E8%BF%87%E7%A8%8B)
几道简便运算题(5-0.2)*3.9+4.8*(4+2.1)166+978 4/7÷4216÷30*25(1/3*1/8)*(3*8)1/12*2/3+1/12*1/30.25*1/5+1/4*0.87.2*5.8+0.72*42请列过程
几道简便运算题
(5-0.2)*3.9+4.8*(4+2.1)
166+97
8 4/7÷4
216÷30*25
(1/3*1/8)*(3*8)
1/12*2/3+1/12*1/3
0.25*1/5+1/4*0.8
7.2*5.8+0.72*42
请列过程
几道简便运算题(5-0.2)*3.9+4.8*(4+2.1)166+978 4/7÷4216÷30*25(1/3*1/8)*(3*8)1/12*2/3+1/12*1/30.25*1/5+1/4*0.87.2*5.8+0.72*42请列过程
1.原算式=4.8*3.9+4.8*6.1
=4.8*(3.9+6.1)
=4.8*10
=48
2.原算式=166-3+97+3
=163+100
=263
3.原算式=12/4
=3
4.原算式=216/15/(4*25)/2
=216/7.5/100
=216/750
=0.288
5.原算式=1/3*3*1/8*8
=1*1=1
6.原算式=1/12*(2/3+1/3)
=1/12*1
=1/12
7.原算式=1/4*0.2+1/4*0.8
=1/4*1
=0.25
8.原算式=0.72*58+0.72*42
=0.72*100
=72
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(1)=4.8*3.9+4.8*6.1
=4.8*(3.9+6.1)
=48
(2)=166+100-3=263
(3)84/(7*4)=3
(4)=216*(5/6)=180
(5)(1/3)*3)*(1/8)*8)=1
(6)=(1/12)*(1/3+2/3)=1/12
(7)=0.25*(0.8+0.2)=0.25
(8)=0.72*(58+42)=72