18×40%+2/5÷1/2=
18×40%+2/5÷1/2=
18×40%+2/5÷1/2
=7.2+2/5x2
=7.2+0.8
=8
2/5-2/5×2/5= 18-5÷【2/3×(1/6+1/3)】=
2/5-2/5×2/5
= 2/5(1-2/5)
=2/5*3/5
=6/25
18-5÷【2/3×(1/6+1/3)】
=18-5÷【2/3×1/2】
=18-5÷1/3
=18-5x3
=18-15
=3
8×40%+2/5÷1/2脱式
8×0.4+0.4×2
=0.4×(8+2)
=4
(-1/2)+(-2/5)+(+3/2)+(18/5)+(39/5)
=(-1/2)+(9/2)-(9又1/2)+(9又3/4)
=(9/2)-(1/2)-9+9+(3/4-2/4)
=4+1/4
=4又1/4
=3/2-1/2+18/5+39/5-2/5
=1+(18+39-2)/5
=1+11
=12
是否可以解决您的问题?
选择:一种钢材2/5米重1/40吨,这种钢材每米重()吨。A1/40÷2/5,B1/40×2/5.C2/5÷1/40,
A....这几年级的哟 貌似今天高考
(-2/9)×(-18)+(-5/11)×(-3)×2又1/5
1, X(原式)=(8-5)*(-3-6)=3*(-9)=-27
2 X=(-123/4)÷(-15)=123/60=41/20
3, X=0.33*3*9=8.91
4, X=9*4*11/12=33
5, X=81*9/4*4/9*1/16=81/16(5.0625)
6, X=(120-7-37)*(35/9)=2660/9(295又5/9)
³√40-√2/5+2√1/10=
³√40-√2/5+2√1/10
=2³√5-1/5√10+1/5√10
=2³√5
3√40-√2/5-2√1/10
3√40-√2/5-2√1/10
=6√10-√10/5-2√10/10
=(6-1/5-1/5)√10
=(28/5)√10
2024-11-19 广告