题目内容
(1)206×18+292
(2)14.4÷0.2×3
(3)(6
-5
+1
)×
(4)[(1.5+2
)×1.6]÷
(5)2005×20062006-2006×20052005
(6)2006-2005+2004-2003+2002-2001+…+4-3+2-1.
(2)14.4÷0.2×3
(3)(6
| 3 |
| 4 |
| 7 |
| 12 |
| 5 |
| 12 |
| 3 |
| 11 |
(4)[(1.5+2
| 2 |
| 3 |
| 1 |
| 3 |
(5)2005×20062006-2006×20052005
(6)2006-2005+2004-2003+2002-2001+…+4-3+2-1.
(1)206×18+292,
=3708+292,
=4000;
(2)14.4÷0.2×3,
=72×3,
=216;
(3)(6
-5
+1
)×
,
=(6
-5
+1
)×
,
=
×
,
=
;
(4)[(1.5+2
)×1.6]÷
,
=[(
+
)×
]÷
,
=[
×
]×3,
=
×3,
=20;
(5)2005×20062006-2006×20052005,
=2005×2006×10001-2006×2005×10001,
=0;
(6)2006-2005+2004-2003+2002-2001+…+4-3+2-1,
=(2006-2005)+(2004-2003)+…+(4-3)+(2-1),
=1×1003,
=1003.
=3708+292,
=4000;
(2)14.4÷0.2×3,
=72×3,
=216;
(3)(6
| 3 |
| 4 |
| 7 |
| 12 |
| 5 |
| 12 |
| 3 |
| 11 |
=(6
| 9 |
| 12 |
| 7 |
| 12 |
| 5 |
| 12 |
| 3 |
| 11 |
=
| 31 |
| 12 |
| 3 |
| 11 |
=
| 31 |
| 44 |
(4)[(1.5+2
| 2 |
| 3 |
| 1 |
| 3 |
=[(
| 3 |
| 2 |
| 8 |
| 3 |
| 8 |
| 5 |
| 1 |
| 3 |
=[
| 25 |
| 6 |
| 8 |
| 5 |
=
| 20 |
| 3 |
=20;
(5)2005×20062006-2006×20052005,
=2005×2006×10001-2006×2005×10001,
=0;
(6)2006-2005+2004-2003+2002-2001+…+4-3+2-1,
=(2006-2005)+(2004-2003)+…+(4-3)+(2-1),
=1×1003,
=1003.
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