2-13分之6霧26分之9-3分之2 (0.75-16分之3)乘(9分之2+3分之1) 【2-(3

2025-05-15 12:57:27
推荐回答(1个)
回答1:

2-13分之6=2-6/13=(26-6)/13
=20/13
=1又7/13
26分之9-3分之2
=9/26-2/3
=(27-52)/78
= -25/78
(0.75-16分之3)乘(9分之2+3分之1)
=(3/4-3/16)×(2/9+1/3)
=(3/16)×(5/9)
=5/48
【2-(3分之2+5分之4)】除15分之8
=[2-(2/3+4/5)]÷(8/15)
=[2-(10+12)/15]×(15/8)
=(30-22)/15×(15/8)
=(8/15)×(15/8)
=1
28乘(4分之1+7分之1-14分之3)
=28×(1/4+1/7-3/14)
=28×(7+4-6)/28
=28×5/28
=5