问题
解答题
| 解下列方程． ①
②1-
③x÷
|
答案
（f）
d=f0 27
×5 f8
，22 05
&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;
d=f0 27
，ff 8f
&nbs9;&nbs9;&nbs9;
d×f0 27
=27 f0
×ff 8f
，27 f0
&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9; d=
；ff j0
（2）f-
d=j f0 f0 f5
f-
d+j f0
d=j f0
+f0 f5
d，j f0
&nbs9;&nbs9;&nbs9;&nbs9;
+f0 f5
d=&nbs9;f，j f0
+f0 f5
d-j f0
=&nbs9;f-f0 f5
，f0 f5
&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;
d×j f0
=f0 j
×f f5
，f0 j
&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9; d=
；2 9
（j）d÷
=0 5
÷f5 52
，2f 2着
&nbs9;&nbs9;&nbs9;&nbs9; d÷
=0 5
，5 f0
&nbs9;d÷
×0 5
=0 5
×5 f0
，0 5
&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9;&nbs9; d=
．2 7