题目内容
计算:
(1)18-6÷(-2)×(-
).
(2)
-
-(-
)+(-
)
(3)(
-
+
-
)×(-36)
(4)-14÷(-5)2×(-
)+|0.8-1|.
(1)18-6÷(-2)×(-
| 1 |
| 3 |
(2)
| 2 |
| 3 |
| 1 |
| 8 |
| 1 |
| 3 |
| 3 |
| 8 |
(3)(
| 1 |
| 2 |
| 5 |
| 9 |
| 5 |
| 6 |
| 7 |
| 12 |
(4)-14÷(-5)2×(-
| 5 |
| 3 |
(1)18-6÷(-2)×(-
)
=18-3×
=18-1
=17;
(2)
-
-(-
)+(-
)
=(
+
)-(
+
)
=1-
=
;
(3)(
-
+
-
)×(-36)
=
×(-36)-
×(-36)+
×(-36)-
×(-36)
=-18+20-30+21
=-7;
(4)-14÷(-5)2×(-
)+|0.8-1|
=-1÷25×(-
)+
=
+
=
.
| 1 |
| 3 |
=18-3×
| 1 |
| 3 |
=18-1
=17;
(2)
| 2 |
| 3 |
| 1 |
| 8 |
| 1 |
| 3 |
| 3 |
| 8 |
=(
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 8 |
| 3 |
| 8 |
=1-
| 1 |
| 2 |
=
| 1 |
| 2 |
(3)(
| 1 |
| 2 |
| 5 |
| 9 |
| 5 |
| 6 |
| 7 |
| 12 |
=
| 1 |
| 2 |
| 5 |
| 9 |
| 5 |
| 6 |
| 7 |
| 12 |
=-18+20-30+21
=-7;
(4)-14÷(-5)2×(-
| 5 |
| 3 |
=-1÷25×(-
| 5 |
| 3 |
| 1 |
| 5 |
=
| 1 |
| 15 |
| 1 |
| 5 |
=
| 4 |
| 15 |
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