1楼:买昭懿
23/5+(-17/6)+(-3/5)+(-7/6)= 23/5-17/6-3/5-7/6
= (23/5-3/5)-(17/6+7/6)= 20/5 - 24/6
= 4 - 4= 0
2楼:匿名用户
lhs=23/5-3/5-(17/6+7/6)=0
怎样算简便就怎样算 5.5×17.3+6.7×5.5
3楼:手机用户
(1)5.5×17.3+6.7×5.5,
=5.5×(17.3+6.7),
=5.5×24,
=132;
(2)4×3.09×0.25,
=(4×0.25)×3.09,
=1×3.09,
=3.09;
(3)9.07-22.78÷3.4,
=9.07-6.7,
=2.37.
(1又2/3+2又3/4+3又 4/5+4又5/6)/(3又 1/3+5又2/4+7又3/5+9又4/6)小学生的算法
4楼:新野旁观者
(1又2/3+2又3/4+3又 4/5+4又5/6)÷(3又 1/3+5又2/4+7又3/5+9又4/6)
=(5/3+11/4+19/5+29/6)÷(10/3+22/4+38/5+58/6)
=(5/3+11/4+19/5+29/6)÷【2×(5/3+11/4+19/5+29/6)】
=1÷2
=1/2
5楼:匿名用户
将先带分数华为假分数,再分子分母分别通分,再相加,最后将分母的分数倒过来与分子的分数相乘,即得运算结果.
原式=(5/3+11/4+17/4+29/6)/(10/3+22/4+38/5+58/6) [ 分子分数的公分母为36,分母分数的公分母为120]
=(5*12/3*12+11*9/4*9+17*9/4*9+29*6/6*6)/(10*40/3*40+22*30/4*30+38*24/5*24+58*20/6*20).
=[(60+99+153+174)/36]/[(400+660+912+1160)/120.
=(486/36)/(3132/120.
=135*(120/3132). [486/36=135]
=13.5*10/261,
=261分之135. ---即为所求.
6楼:流沙
两个括号同时乘以公倍数60,值不变。
=(100+165+228+290)/(200+330+456+580)
=1/2
7楼:紫寒凝梦
整数位相加,通分分数相加
一.计算下面各题(递等式) (1).3分之1+9分之7+6分之5+18分之17 (2)11分之6-(11分之6-9分之7)
8楼:强肚很大
1/3+7/9+5/6+17/18
=6/18+14/18+15/18+17/18=52/18
=26/9
=2又8/9
6/11-
(6/11-7/9)
=6/11-6/11+7/9
=0+7/9
=7/9
15-5÷12-7/12
=15-5/12-7/12
=15-(5/12+7/12)
=15-1
=14120÷4-12-9
=30-12-9
=18-9
=9答:高是9厘米。