题目内容
-10-50÷22×(-
)-(1-0.5)×
×[1-(-3)2]．
| 4 |
| 5 |
| 2 |
| 3 |
原式=-10-50÷4×（-
）-0.5×
×（1-9）
=-10+50×
×
+0.5×
×8
=-10+10+
=
．
| 4 |
| 5 |
| 2 |
| 3 |
=-10+50×
| 1 |
| 4 |
| 4 |
| 5 |
| 2 |
| 3 |
=-10+10+
| 8 |
| 3 |
=
| 8 |
| 3 |
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