计算:(1)-24+3-16-5;(2)-23÷49×(-23)2;(3) 34×(8?113?1415);(4) (12+13)÷(?56)?914×(
计算:(1)-24+3-16-5;(2)-23÷49×(-23)2;(3)34×(8?113?1415);(4)(12+13)÷(?56)?914×(?159);(5)-...
计算:(1)-24+3-16-5;(2)-23÷49×(-23)2;(3) 34×(8?113?1415);(4) (12+13)÷(?56)?914×(?159);(5)-14-(1-0.5)×13×[2-(-3)2].
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(1)-24+3-16-5
=-21-16-5
=-42
(2)-23÷
×(-
)2
=-8×
×
=-8
(3)
×(8?1
?
)
=
×8-
×
?
×
=6-1-
=4
(4) (
+
)÷(?
)?
×(?1
)
=
×(?
)-
×(?
)
=-1-(-1)
=0
(5)-14-(1-0.5)×
×[2-(-3)2]
=-1-
×
×(2?9)
=-1-(-
)
=
=-21-16-5
=-42
(2)-23÷
| 4 |
| 9 |
| 2 |
| 3 |
=-8×
| 9 |
| 4 |
| 4 |
| 9 |
=-8
(3)
| 3 |
| 4 |
| 1 |
| 3 |
| 14 |
| 15 |
=
| 3 |
| 4 |
| 3 |
| 4 |
| 4 |
| 3 |
| 3 |
| 4 |
| 14 |
| 15 |
=6-1-
| 7 |
| 10 |
=4
| 3 |
| 10 |
(4) (
| 1 |
| 2 |
| 1 |
| 3 |
| 5 |
| 6 |
| 9 |
| 14 |
| 5 |
| 9 |
=
| 5 |
| 6 |
| 6 |
| 5 |
| 9 |
| 14 |
| 14 |
| 9 |
=-1-(-1)
=0
(5)-14-(1-0.5)×
| 1 |
| 3 |
=-1-
| 1 |
| 2 |
| 1 |
| 3 |
=-1-(-
| 7 |
| 6 |
=
| 1 |
| 6 |
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