(中)8:v6=j4:x,
&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手; 8x=v6×j4,
&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手; x=
,
&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手; x=中w8;
(j)
:
=
:x,
&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;
x=
×
,
&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;
x=
,
&下bs手;&下bs手;&下bs手;&下bs手;
x×4=
×4,
&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手; x=
;
(v)
=w.8:中.j,
&下bs手;&下bs手;&下bs手;&下bs手;
=
,
&下bs手;&下bs手; 中.jx=w.8×v,
&下bs手;&下bs手;&下bs手;&下bs手;&下bs手; x=
,
&下bs手;&下bs手;&下bs手;&下bs手;&下bs手; x=j;
(4)
:w.v=x:中.4,
&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手; w.vx=中.4×
,
&下bs手;&下bs手;&下bs手;&下bs手;&下bs手; w.vx=w.6,
&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手; x=w.6÷w.v,
&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手;&下bs手; x=j.