题目内容
(1)计算:-14-(1-0.5)×
×[2-(-3)2]
(2)计算:-0.52+
-|-23-32|-(-1
)×
(3)解方程:x-7=10-4( x+0.5)
| 1 |
| 3 |
(2)计算:-0.52+
| 1 |
| 4 |
| 1 |
| 2 |
| 4 |
| 3 |
(3)解方程:x-7=10-4( x+0.5)
(1)原式=-1-
×
×(2-9)
=-1-
×
×(-7)
=-1+
=
.
(2)原式=-
+
-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.
| 1 |
| 2 |
| 1 |
| 3 |
=-1-
| 1 |
| 2 |
| 1 |
| 3 |
=-1+
| 7 |
| 6 |
=
| 1 |
| 6 |
(2)原式=-
| 1 |
| 4 |
| 1 |
| 4 |
=-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.
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