题目内容
(-5)×8×(-0.125)=
)×
×
=
5
5
;(-| 4 |
| 5 |
| 3 |
| 4 |
| 5 |
| 3 |
-1
-1
.分析:把0.125化为分数,然后约分可得到(-5)×8×(-0.125)=5×8×
=5;利用约分计算(-
)×
×
.
| 1 |
| 8 |
| 4 |
| 5 |
| 3 |
| 4 |
| 5 |
| 3 |
解答:解:(-5)×8×(-0.125)=5×8×
=5×1=5;
(-
)×
×
=-
×
×
=-1.
故答案为5,-1.
| 1 |
| 8 |
(-
| 4 |
| 5 |
| 3 |
| 4 |
| 5 |
| 3 |
| 4 |
| 5 |
| 3 |
| 4 |
| 5 |
| 3 |
故答案为5,-1.
点评:本题考查了有理数乘法:两数相乘,同号得正,异号得负,并把绝对值相乘.
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