题目内容
脱式计算．
（0.125×8-0.5）×4 （1-
×
）÷
5
÷[（
+1
）×1.6]．
（0.125×8-0.5）×4 （1-
| 1 |
| 4 |
| 8 |
| 9 |
| 7 |
| 9 |
| 1 |
| 7 |
| 17 |
| 24 |
| 1 |
| 6 |
分析：根据四则混合运算的运算顺序和计算法则进行计算即可．
解答：解：①（0.125×8-0.5）×4
=（1-0.5）×4
=0.5×4
=2；
②（1-
×
）÷
=（1-
）÷
=
×
=1；
③5
÷[（
+1
）×1.6]
=5
÷[（
×1.6]
=5
÷[
×
]
=
÷3
=1
．
=（1-0.5）×4
=0.5×4
=2；
②（1-
| 1 |
| 4 |
| 8 |
| 9 |
| 7 |
| 9 |
=（1-
| 2 |
| 9 |
| 7 |
| 9 |
=
| 7 |
| 9 |
| 9 |
| 7 |
=1；
③5
| 1 |
| 7 |
| 17 |
| 24 |
| 1 |
| 6 |
=5
| 1 |
| 7 |
| 45 |
| 24 |
=5
| 1 |
| 7 |
| 45 |
| 24 |
| 8 |
| 5 |
=
| 36 |
| 7 |
=1
| 5 |
| 7 |
点评：计算要细心，注意通分与运算顺序．
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