题目内容
计算(能简便的用简便方法计算):
(1)(-16)-[(-5
)+(-3
)+(+3
)+(-2
)];
(2)1÷(1-
)÷(1-
)÷(1-
)÷(1-
)÷(1-
);
(3)(-
)÷(1
-
-
);
(4)
;
(5)(-98)×(-0.125)+(-98)×
-98×(-
).
(1)(-16)-[(-5
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 7 |
| 1 |
| 7 |
(2)1÷(1-
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 6 |
(3)(-
| 7 |
| 8 |
| 3 |
| 4 |
| 7 |
| 8 |
| 7 |
| 12 |
(4)
| (-1)8×(-2)3-3×22÷[-1÷(-2)2] |
| 0.25×22+[1-32×(-2)] |
(5)(-98)×(-0.125)+(-98)×
| 1 |
| 8 |
| 4 |
| 7 |
(1)原式=-16-(-9+1)=-16+9-1=-8;
(2)原式=1×2×
×
×
×
=6;
(3)原式=-
÷(
-
-
)=-
×
=-3;
(4)原式=
=2;
(5)原式=(-98)×(-0.125+
-
)=(-98)×(-
+
-
)=-98×(-
)=56.
(2)原式=1×2×
| 3 |
| 2 |
| 4 |
| 3 |
| 5 |
| 4 |
| 6 |
| 5 |
(3)原式=-
| 7 |
| 8 |
| 42 |
| 24 |
| 21 |
| 24 |
| 14 |
| 24 |
| 7 |
| 8 |
| 24 |
| 7 |
(4)原式=
| -8+12×4 |
| 1+19 |
(5)原式=(-98)×(-0.125+
| 1 |
| 8 |
| 4 |
| 7 |
| 1 |
| 8 |
| 1 |
| 8 |
| 4 |
| 7 |
| 4 |
| 7 |
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