题目内容
(1)2012×
(2)
×78+0.5×1.25-730÷80
(3)56÷11×165÷7
(4)(
-
)×28+4
×7-3
×7.
| 2010 |
| 2011 |
(2)
| 1 |
| 8 |
(3)56÷11×165÷7
(4)(
| 1 |
| 4 |
| 1 |
| 7 |
| 4 |
| 7 |
| 4 |
| 7 |
(1)2012×
,
=(2011+1)×
,
=2010+
,
=2010
;
(2)
×78+0.5×1.25-730÷80
=1.25×78+0.5×1.25-73÷8,
=1.25×78+0.5×1.25-7.3×1.25,
=1.25×(7.8+0.5-7.3),
=1.25;
(3)56÷11×165÷7,
=(56÷7)×(165÷11),
=8×15,
=120;
(4)(
-
)×28+4
×7-3
×7,
=
×28-
×28+4
×7-3
×7,
=7-4+(4
-3
)×7,
=3+7,
=10.
| 2010 |
| 2011 |
=(2011+1)×
| 2010 |
| 2011 |
=2010+
| 2010 |
| 2011 |
=2010
| 2010 |
| 2011 |
(2)
| 1 |
| 8 |
=1.25×78+0.5×1.25-73÷8,
=1.25×78+0.5×1.25-7.3×1.25,
=1.25×(7.8+0.5-7.3),
=1.25;
(3)56÷11×165÷7,
=(56÷7)×(165÷11),
=8×15,
=120;
(4)(
| 1 |
| 4 |
| 1 |
| 7 |
| 4 |
| 7 |
| 4 |
| 7 |
=
| 1 |
| 4 |
| 1 |
| 7 |
| 4 |
| 7 |
| 4 |
| 7 |
=7-4+(4
| 4 |
| 7 |
| 4 |
| 7 |
=3+7,
=10.
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