灵鹊做题网简便计算和解方程,
来源：学生作业帮 编辑：灵鹊做题网作业帮 分类：数学作业 时间：2024/04/19 09:53:58
简便计算和解方程,
(7x/4)*(1/14)=1/2 x=(1*14*4)/(2*7)=4
(3/5)*(5/27)*(3/8)=(3*5*3)/(5*27*8)=1/24
(2/3)*(5/4)/(10/9)=(2/3)*(5/4)*(9/10)=(2*5*9)/(3*4*10)=3/4
(34/13)-(3/13+5/7)=(34/13-3/13)-5/7=31/13-5/7=152/91
2-(3/8)/(7/16)-1/7=2-(3/8)*(16/7)-1/7=2-6/7-1/7=2-(6/7+1/7)=2-1=1
(5/12)/8+(1/8)*(7/12)=(5/12)*(1/8)+(1/8)*(7/12)=(1/8)*(5/12+7/12)=(1/8)*1=1/8
(3/5)*(5/27)*(3/8)=(3*5*3)/(5*27*8)=1/24
(2/3)*(5/4)/(10/9)=(2/3)*(5/4)*(9/10)=(2*5*9)/(3*4*10)=3/4
(34/13)-(3/13+5/7)=(34/13-3/13)-5/7=31/13-5/7=152/91
2-(3/8)/(7/16)-1/7=2-(3/8)*(16/7)-1/7=2-6/7-1/7=2-(6/7+1/7)=2-1=1
(5/12)/8+(1/8)*(7/12)=(5/12)*(1/8)+(1/8)*(7/12)=(1/8)*(5/12+7/12)=(1/8)*1=1/8