题目内容
耐心算一算
(1)(-3)+(-4)-(+11)-(-19);
(2)-3.5÷
×(-
)×|-
|;
(3)(
-
+
)×(-48);
(4)-12-(1-0.5)×
×[2-(-3)2].
(1)(-3)+(-4)-(+11)-(-19);
(2)-3.5÷
7 |
8 |
8 |
7 |
3 |
64 |
(3)(
3 |
8 |
2 |
3 |
1 |
2 |
(4)-12-(1-0.5)×
1 |
3 |
(1)原式=-3-4-11+19
=-18+19
=1;
(2)原式=
×
×
×
=
;
(3)原式=-
×48+
×48-
×48
=-18+32-24
=-42+32
=-10;
(4)原式=-1-
×
×[2-9].
=-1+-
×
×[-7].
=-1+
=
.
=-18+19
=1;
(2)原式=
7 |
2 |
8 |
7 |
8 |
7 |
3 |
64 |
=
3 |
14 |
(3)原式=-
3 |
8 |
2 |
3 |
1 |
2 |
=-18+32-24
=-42+32
=-10;
(4)原式=-1-
1 |
2 |
1 |
3 |
=-1+-
1 |
2 |
1 |
3 |
=-1+
7 |
6 |
=
1 |
6 |
练习册系列答案
相关题目