3.3×3/4 0.75×5.7怎么解
3.3×3/4 0..75×5.7怎么解
3.3x3/4+0.75x5.7
=3.3x0.75+0.75x5.7
=0.75x(3.3+5.7)
=0.75x(10-1)
=0.75x10-0.75
=7.5-0.75
=6.75
3/4x+1/4=3/8怎么解
3/4x=3/8-1/4
3/4x=1/8
3=x/2
x=6
3.3÷3/4+0.75×57/10+0.75
3.3÷4/3+0.75×57/10+0.75
=3.3×0.75+0.75×5.7+0.75×1
=0.75×(3.3+5.7+1)
=0.75×10
=7.5
3+56÷0.8-5.7 (3/4×1/6+3/4×5/6)÷3/2简便计算
3+56÷0.8-5.7
=3+70-5.7
=73-5.7
=67.3
(3/4×1/6+3/4×5/6)÷3/2简便计算
(3/4×1/6+3/4×5/6)÷3/2
=3/4*(1/6+5/6)÷3/2
=3/4*1*2/3
=1/2
分数奥数3/4*( / )=( /)*3/7=(/)*(/)=(/)+3/1=(/)-3/1=1怎么解
3/4*(4/3)=(7/3)*3/7=(2/3)*(3/2)=(3/2)+3/1=(3/4)-3/1=1
3/5X+45=3/4X+3 怎么解?
3/5X+45=3/4X+3
45-3=3/4X-3/5X
42=3/20或者42=0.75X-0.6X
x=280
3/4x的平方-3/2+1/4=1怎么解
先移项 3/4x的平方=1-1/4+3/2
3/4x的平方=9/4
同时乘以4 3x的平方=9
x=√3 或-√3
cosθ=3/4怎么解
(1-cosθ)/(4+sin^2θ)=1/2
∴2-2cosθ=4+sin²θ
∴2-2cosθ=5-cos²θ
即cos²θ-2cosθ-3=0
解得
cosθ=-1或cosθ=3>1(舍去)
则sinθ=0
(4+cos³θ)(3+sin³θ)
=(4-1)(3+0)
=3×3
=9 采纳吧
解方程 3X+3.3=7.92 2.5×8-2X=12 1/2×(X+1)=3/4 3/4X-0.05X=17.5
(1)3x+3.3=7.92
3x=7.92-3.3
3x=4.62
x=1.54
(2)2.5*8-2x=12
2x=20-12
2x=8
x=4
(3)1/2(x+1)=3/4
x+1=3/2
x=1/2
(4)3/4x-0.05x=17.5
3/4x-1/20x=17.5
15x-x=350
14x=350
x=25
三个都解好了
(—3/4)×(—3.5)×3/4怎么算?
硬乘吧 原式=(3/4)x(7/2)x3/4=(9/16)x(7/2)=63/32