题目内容
| 9.63-7.52-2.49+0.43 | 2000-1998+1996-1994+…-6+4-2 | ||||||||||||||||||
|
[1-(
|
(1)9.63-7.52-2.49+0.43,
=(9.63+0.43)-(7.52+2.49),
=10.06-10.01,
=0.05;
(2)2000-1998+1996-1994+…-6+4-2,
=++…+(8-6)+(4-2),
=2×500,
=1000;
(3)
×(0.875×12.4+1+4.4×
)×
-
,
=
×(
×12.4+1+4.4×
)-
,
=
×[(12.4+4.4)×
+1]-
,
=
×[16.8×
+1]-
,
=
×[14.7+1]-
,
=
×15.7-
,
=
×(15+
)-
,
=10+
-
,
=10
;
(4)[1-(
+
)×2
]÷
,
=[1-(
+
)×2
]÷
,
=[1-(
+
)×2
]÷
,
=[1-
×
]÷
,
=[1-
]×
,
=
×
,
=
.
=(9.63+0.43)-(7.52+2.49),
=10.06-10.01,
=0.05;
(2)2000-1998+1996-1994+…-6+4-2,
=++…+(8-6)+(4-2),
=2×500,
=1000;
(3)
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=
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=
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=
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=
| 2 |
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| 1 |
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=10+
| 7 |
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| 1 |
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=10
| 13 |
| 60 |
(4)[1-(
| 1 | ||
12+
|
| 1 |
| 10 |
| 1 |
| 2 |
| 11 |
| 25 |
=[1-(
| 1 | ||
|
| 1 |
| 10 |
| 1 |
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| 11 |
| 25 |
=[1-(
| 2 |
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| 1 |
| 10 |
| 1 |
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| 11 |
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=[1-
| 9 |
| 50 |
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=[1-
| 9 |
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| 11 |
=
| 11 |
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| 11 |
=
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| 4 |
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