题目内容
计算
(1)-1÷(-
)-3÷(-
);
(2)-81÷
-
÷(-
).
(3)-1+5÷(-
)×(-6);
(4)(
-
)÷1
÷
.
(1)-1÷(-
1 |
8 |
1 |
2 |
(2)-81÷
1 |
3 |
1 |
3 |
1 |
9 |
(3)-1+5÷(-
1 |
6 |
(4)(
1 |
3 |
1 |
2 |
1 |
4 |
1 |
10 |
(1)-1÷(-
)-3÷(-
)
=-1×(-8)-3×(-2)
=8+6
=14;
(2)-81÷
-
÷(-
)
=-81×3-
×(-9)
=-243+3
=-240;
(3)-1+5÷(-
)×(-6)
=-1+5×(-6)×(-6)
=-1+180
=179;
(4)(
-
)÷1
÷
=-
×
×10
=-
.
1 |
8 |
1 |
2 |
=-1×(-8)-3×(-2)
=8+6
=14;
(2)-81÷
1 |
3 |
1 |
3 |
1 |
9 |
=-81×3-
1 |
3 |
=-243+3
=-240;
(3)-1+5÷(-
1 |
6 |
=-1+5×(-6)×(-6)
=-1+180
=179;
(4)(
1 |
3 |
1 |
2 |
1 |
4 |
1 |
10 |
=-
1 |
6 |
4 |
5 |
=-
4 |
3 |
练习册系列答案
相关题目