Question

(1)计算:-14-(1-0.5)×13×[2-(-3)2] (2)计算:-0....

(1)计算:-14-(1-0.5)×13×[2-(-3)2] (2)计算:-0.52+14-|-23-32|-(-112)×43 (3)解方程:x-7=10-4( x+0.5)

Answer 1

(1)原式=-1-
1
2
×
1
3
×(2-9)
=-1-
1
2
×
1
3
×(-7)
=-1+
7
6
=
1
6
.
(2)原式=-
1
4
+
1
4
-17+2
=-15.
(3)去括号,得x-7=10-4x-2
移项,得x+4x=10-2+7
合并同类项,得5x=15
系数化1,得x=3.