题目内容
计算
(1)(-12)-(-
)+(-8)-
(2)1-42÷5×(-
)
(3)(
-
-
)×(-60)
(4)-14÷(-5)2×(-
)+0.1-1.
(1)(-12)-(-
| 6 |
| 5 |
| 8 |
| 10 |
(2)1-42÷5×(-
| 1 |
| 5 |
(3)(
| 2 |
| 3 |
| 1 |
| 12 |
| 4 |
| 15 |
(4)-14÷(-5)2×(-
| 5 |
| 3 |
(1)原式=-12+
-8-
=-20+
=-19
;
(2)原式=1+16÷5×
=1+
=
;
(3)原式=-
×60+
×60+
×60
=-40+5+16
=-19;
(4)原式=-1÷25×(-
)+0.1-1
=1×
×
+0.1-1
=
+
-1
=-
.
| 6 |
| 5 |
| 4 |
| 5 |
=-20+
| 2 |
| 5 |
=-19
| 3 |
| 5 |
(2)原式=1+16÷5×
| 1 |
| 5 |
=1+
| 16 |
| 25 |
=
| 41 |
| 25 |
(3)原式=-
| 2 |
| 3 |
| 1 |
| 12 |
| 4 |
| 15 |
=-40+5+16
=-19;
(4)原式=-1÷25×(-
| 5 |
| 3 |
=1×
| 1 |
| 25 |
| 5 |
| 3 |
=
| 1 |
| 15 |
| 1 |
| 10 |
=-
| 5 |
| 6 |
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