题目内容
计算:
(1)0÷(-3
);
(2)-
×(-3
)÷(-1
)÷3;
(3)(-81)÷
×
÷(-16);
(4)(2
-3
+1
)÷(-1
).
(1)0÷(-3
| 7 |
| 99 |
(2)-
| 3 |
| 5 |
| 1 |
| 2 |
| 1 |
| 4 |
(3)(-81)÷
| 9 |
| 4 |
| 4 |
| 9 |
(4)(2
| 1 |
| 3 |
| 1 |
| 2 |
| 4 |
| 45 |
| 1 |
| 6 |
(1)原式=0;
(2)原式=-(
×
×
×
),
=-
;
(3)原式=81×
×
×
=1;
(4)原式=(
-
+
)×(-
)
=
×(-
)-
×(-
)+
×(-
)
=-2+3-
=
.
(2)原式=-(
| 3 |
| 5 |
| 7 |
| 2 |
| 4 |
| 5 |
| 1 |
| 3 |
=-
| 14 |
| 25 |
(3)原式=81×
| 4 |
| 9 |
| 4 |
| 9 |
| 1 |
| 16 |
=1;
(4)原式=(
| 7 |
| 3 |
| 7 |
| 2 |
| 49 |
| 45 |
| 6 |
| 7 |
=
| 7 |
| 3 |
| 6 |
| 7 |
| 7 |
| 2 |
| 6 |
| 7 |
| 49 |
| 45 |
| 6 |
| 7 |
=-2+3-
| 14 |
| 15 |
=
| 1 |
| 15 |
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