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 |
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