问题
解答题
4.72-1.16-2.84 2-
375+450÷18×25 3(x-2.1)=8.4 x-
|
答案
÷(4 5
-5 8
)÷1 2
,5 8
=
÷4 5
÷1 8
,5 8
=
×8×4 5
,8 5
=
;256 25
4.72-1.16-2.84,
=4.72-(1.16+2.84),
=4.72-4,
=0.72;
2-
×6 13
-26 9
,2 3
=2-(
+4 3
),2 3
=2-2,
=0;
375+450÷18×25
=375+25×25
=375+625
=1000;
3(x-2.1)=8.4,
x-2.1=2.8,
x=2.8+2.1,
x=4.9;
x-
x=3 4
,3 5
x=1 4
,3 5
x=
÷3 5
,1 4
x=
.12 5