题目内容
细致算一算!
①|-2|-(-2.5)-|1-4|;
②-
×(-3)+(-
)×5;
③(-
)+(+
)+(-
)+(+
)+(-
);
④-1
-(-2
)+(-3
)-(-4.75);
⑤-5×(-
)+13×(-
)-3×(-
);
⑥-0.25÷(-
)×(-1
).
①|-2|-(-2.5)-|1-4|;
②-
| 1 |
| 3 |
| 1 |
| 5 |
③(-
| 1 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
| 4 |
| 5 |
| 1 |
| 2 |
④-1
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 2 |
⑤-5×(-
| 11 |
| 5 |
| 11 |
| 5 |
| 11 |
| 5 |
⑥-0.25÷(-
| 2 |
| 3 |
| 3 |
| 5 |
(1)原式=2+2.5-3,
=1.5;
(2)原式=1-1,
=0;
(3)原式=-
+
-
+
-
,
=-1+
,
=-
;
(4)原式=-1
+2
-3
+4.75,
=-1
-3
+2
+4
,
=-5
+2
+4
,
=-3+4
,
=-1
;
(5)原式=-
(-5+13-3),
=-
×5,
=-11;
(6)原式=-
×(-
)×(-
),
=-
.
=1.5;
(2)原式=1-1,
=0;
(3)原式=-
| 1 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
| 4 |
| 5 |
| 1 |
| 2 |
=-1+
| 4 |
| 5 |
=-
| 1 |
| 5 |
(4)原式=-1
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 2 |
=-1
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 4 |
=-5
| 1 |
| 3 |
| 1 |
| 3 |
| 3 |
| 4 |
=-3+4
| 3 |
| 4 |
=-1
| 3 |
| 4 |
(5)原式=-
| 11 |
| 5 |
=-
| 11 |
| 5 |
=-11;
(6)原式=-
| 1 |
| 4 |
| 3 |
| 2 |
| 8 |
| 5 |
=-
| 3 |
| 5 |
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