题目内容
(1)15+(-
)-15-(-0.25);
(2)(-81)÷
×
÷(-32);
(3)29
×(-12);
(4)25×
-(-25)×
+25×(-
).
1 |
4 |
(2)(-81)÷
9 |
4 |
4 |
9 |
(3)29
23 |
24 |
(4)25×
3 |
4 |
1 |
2 |
1 |
4 |
(1)原式=15-0.25-15+0.25
=0;
(2)原式=-81×
×
×(-
)
=
;
(3)原式=(30-
)×(-12)
=-360+
=-359
;
(4)原式=25×(
+
-
)
=25×1
=25.
=0;
(2)原式=-81×
4 |
9 |
4 |
9 |
1 |
32 |
=
1 |
2 |
(3)原式=(30-
1 |
24 |
=-360+
1 |
2 |
=-359
1 |
2 |
(4)原式=25×(
3 |
4 |
1 |
2 |
1 |
4 |
=25×1
=25.
练习册系列答案
相关题目