X*X=24 解方程 解比例 1.4:1又四分之一=X:0.75 X分之10=4又二分之一:0.8

2024-12-27 11:18:11
推荐回答(2个)
回答1:

x*x=24
x=±√24

4:1又1/4=X:0.75
5/4X=4*0.75
5/4X=3
X=3*4/5
X=12/5

10/X=4又1/2:0.8
10/X=9/2÷4/5
10/X=9/2*5/4
10/X=45/8
45/8X=10
X=10*8/45
X=16/9

7又3/4*0.6+2/5*7.75
=7.75*0.6+0.4*7.75
=7.75*(0.6+0.4)
=7.75*1
=7.75

13又7/8-(8.16+1.875)-0.84
=13.875-8.16-1.875-0.84
=13.875-1.875-(8.16+0.84)
=12-9
=3

回答2:

除号就是比号,