题目内容
(1)2011×
+1004×
(2)(
x-9)×
=x-9
(3)
+
+
+
+…+
(4)
+
(5)2009÷2009
+2009
(6)
+
+
+…+
.
| 2009 |
| 2010 |
| 1004 |
| 1005 |
(2)(
| 1 |
| 2 |
| 1 |
| 5 |
(3)
| 1 |
| 2 |
| 5 |
| 6 |
| 11 |
| 12 |
| 19 |
| 20 |
| 109 |
| 110 |
(4)
| 573+697×572 |
| 573×697-124 |
| 363636 |
| 727272 |
(5)2009÷2009
| 2009 |
| 2010 |
| 1 |
| 2011 |
(6)
| 2 |
| 1×7 |
| 2 |
| 7×13 |
| 2 |
| 13×19 |
| 2 |
| 145×151 |
(1)2011×
+1004×
,
=(2010+1)×
+(1005-1)×
,
=2010×
+
+1005×
-
,
=2009+
+1004-
,
=3013+
,
=3013
;
(2)(
x-9)×
=x-9,
(
x-9)×
×5=(x-9)×5,
x-9=5x-45,
x-9+9=5x-45+9,
x=5x-36,
x-
x=5x-36-
x,
4
x-36=0,
4
x-36+36=0+36,
x=36,
x×
=36×
,
x=8;
(3)
+
+
+
+…+
,
=1-
+1-
+1-
+1-
+…+1-
,
=1+1+…+1-(
+
+
+
+…+
),
=10-(1-
+
-
+
-
+…+
-
),
=10-(1-
),
=10-1+
,
=9
;
(4)
+
,
=
+
,
=
+
,
=1+
,
=1
;
(5)2009÷2009
+2009
,
=2009÷
+2009+
,
=2009×
+2009+
,
=
+
+2009,
=1+2009,
=2010;
(6)
+
+
+…+
,
=
×(
+
+
+…+
)
=
×(1-
+
-
+
-
+…
-
)
=
×(1-
)
=
×
,
=
.
| 2009 |
| 2010 |
| 1004 |
| 1005 |
=(2010+1)×
| 2009 |
| 2010 |
| 1004 |
| 1005 |
=2010×
| 2009 |
| 2010 |
| 2009 |
| 2010 |
| 1004 |
| 1005 |
| 1004 |
| 1005 |
=2009+
| 2009 |
| 2010 |
| 2008 |
| 2010 |
=3013+
| 1 |
| 2010 |
=3013
| 1 |
| 2010 |
(2)(
| 1 |
| 2 |
| 1 |
| 5 |
(
| 1 |
| 2 |
| 1 |
| 5 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
4
| 1 |
| 2 |
4
| 1 |
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 2 |
| 9 |
| 2 |
| 9 |
x=8;
(3)
| 1 |
| 2 |
| 5 |
| 6 |
| 11 |
| 12 |
| 19 |
| 20 |
| 109 |
| 110 |
=1-
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 110 |
=1+1+…+1-(
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 110 |
=10-(1-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 10 |
| 1 |
| 11 |
=10-(1-
| 1 |
| 11 |
=10-1+
| 1 |
| 11 |
=9
| 1 |
| 11 |
(4)
| 573+697×572 |
| 573×697-124 |
| 363636 |
| 727272 |
=
| 573+697×(573-1) |
| 573×697-124 |
| 36×10101 |
| 72×10101 |
=
| 573×697-124 |
| 573×697-124 |
| 1 |
| 2 |
=1+
| 1 |
| 2 |
=1
| 1 |
| 2 |
(5)2009÷2009
| 2009 |
| 2010 |
| 1 |
| 2011 |
=2009÷
| 2010×2009+2009 |
| 2010 |
| 1 |
| 2011 |
=2009×
| 2010 |
| 2009×2011 |
| 1 |
| 2011 |
=
| 2010 |
| 2011 |
| 1 |
| 2011 |
=1+2009,
=2010;
(6)
| 2 |
| 1×7 |
| 2 |
| 7×13 |
| 2 |
| 13×19 |
| 2 |
| 145×151 |
=
| 1 |
| 3 |
| 6 |
| 1×7 |
| 6 |
| 7×13 |
| 6 |
| 13×19 |
| 6 |
| 145×151 |
=
| 1 |
| 3 |
| 1 |
| 7 |
| 1 |
| 7 |
| 1 |
| 13 |
| 1 |
| 13 |
| 1 |
| 19 |
| 1 |
| 145 |
| 1 |
| 151 |
=
| 1 |
| 3 |
| 1 |
| 151 |
=
| 1 |
| 3 |
| 150 |
| 151 |
=
| 50 |
| 151 |
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