(判断对错~判断算式对错)A.340＋5分之2 (对错?在下面写上对或错)B.340×(1+5分之2)C.340+340

你的第一道题没看明白什么意思~
计算下列各题（"/"是分数线)
1.12×(5/9)+1/6 = 4×(5/3)+1/6 = 20/3+1/6 = 40/6 + 1/6 = 41/6
2.1/6 - (2/3) ×(1/8) = 3/24-2/24= 1/24
3.(7/10 + 1/4)×5=(14/20+5/20)×5=19/20 ×5 = 19/4
简便算法:
1.(3/5-1/2)×(5/3)= (3/5)×(5/3)-(1/2)×(5/3)= 1-5/6=1/6
2.24×(5/36)-3/8=10/3-3/8=80/24-9/24=71/24
3.约分得3/11
4.=12×(2/3)+12×(1/6)=8+2=10
5.约分得1/18
6.=3/4×(2/5+3/5)=3/4×1=3/4

楼主多大了

d.d.c.d

计算下列各题（"/"是分数线)
1. 12×(5/9)+1/6 = 4×(5/3)+1/6 = 20/3+1/6 = 40/6 + 1/6 = 41/6
2. 1/6 - (2/3) ×(1/8) = 3/24-2/24= 1/24
3.(7/10 + 1/4)×5=(14/20+5/20)×5=19/20 ×5 = 19/4
简便算法:
1. (3/5-...