(-3\/4)X(-8+2\/3-1\/3)=多少?
解原式=(-3\/4)*(-8)+(-3\/4)*(1\/3)=23\/4
(-3\/4)X(-8+2\/3-1\/3)=多少?
(-3\/4)X(-8+2\/3-1\/3)=(-3\/4)X(-8+1\/3)=(-3\/4)X(-8)+(-3\/4)X(1\/3)=6-1\/4 =5又3\/4
(-3\/4)*(-8+2\/3-1\/3)
回答:(-3\/4)X(-8+2\/3-1\/3) =(-3\/4)x(-8+1\/3) =(-3\/4)x(-23\/3) =23\/4
球(-3\/4)×(-8+2\/3-1\/3)算式
(-3\/4)×(-8+2\/3-1\/3)=(-3\/4)×(-8)+(-3\/4)×2\/3-(-3\/4)×1\/3 =6-1\/2+1\/4 =5又3\/4
(-4分之3)x(-8+3分之2-3分之1)
回答:5又4分之3
括号负3\/4收括号乘括号8-4\/3-0.4收括号等于多少?
计算:(-3\/4)*(8-4\/3-0.4)=(-3\/4)*(8-4\/3-2\/5)=(-3\/4)*8-(-3\/4)*4\/3-(-3\/4)*2\/5 =-6+1+3\/10 =-5+3\/10 =-4又7\/10
-3\/4×(8-2又1\/3-0.04)
-3\/4×(8-2又1\/3-0.04)=-(3\/4×8-3\/4×7\/3-3\/4×0.04)=-(2-7\/4-0.03)=-0.22
9\/20-3\/4x=0.3解方程过程?
(1)√(1\/3);(2)√(-2);(3)-√(x^2+1);(4)9;(5)√((1\/(-3))^2 );(6)√(1-x) (x>1)A.2个 B.3个 C.4个 D.5个1.C【解析】根据二次根式的概念,知(2)(6)中的被开方数都不会恒大于等于0,故不是二次根式;(4)中的根指数是3,故不是二次根式;故二次根式是(1)(3)(5)...
-3\/4×(8-2又1\/3-0.04)
-3\/4×(8-2又1\/3-0.04)=-(3\/4×8-3\/4×7\/3-3\/4×0.04)=-(2-7\/4-0.03)=-0.22