题目内容
| 计算. 2009×
| 24×(
| (3.12+0.9)÷[(1-0.4)÷0.1] | ||||||||||||||
(4.7+3
|
|
|
(1)2009×
=(2010-1)×
,
=2010×
-
,
=2009-
,
=2008
;
(2)24×(
-
+
)
=24×
-24×
+24×
,
=20-6+16,
=30;
(3)(3.12+0.9)÷[(1-0.4)÷0.1]
=4.02÷[0.6÷0.1],
=4.02÷6,
=0.67;
(4)(4.7+3
)÷[(4
-3.5)×2
]
=(4.7+3.4)÷[(
-
)×
],
=8.1÷[(
-
)×
],
=8.1÷[
×
],
=8.1×
,
=5.4;
(5)
χ-1=0.9×
x-1=0.6,
x÷
=1.6÷
,
x=2.4;
(6)
:
=8:χ
x=
×8,
x÷
=
×8÷
,
x=48.
| 2009 |
| 2010 |
=(2010-1)×
| 2009 |
| 2010 |
=2010×
| 2009 |
| 2010 |
| 2009 |
| 2010 |
=2009-
| 2009 |
| 2010 |
=2008
| 1 |
| 2010 |
(2)24×(
| 5 |
| 6 |
| 1 |
| 4 |
| 2 |
| 3 |
=24×
| 5 |
| 6 |
| 1 |
| 4 |
| 2 |
| 3 |
=20-6+16,
=30;
(3)(3.12+0.9)÷[(1-0.4)÷0.1]
=4.02÷[0.6÷0.1],
=4.02÷6,
=0.67;
(4)(4.7+3
| 2 |
| 5 |
| 1 |
| 7 |
| 1 |
| 3 |
=(4.7+3.4)÷[(
| 29 |
| 7 |
| 7 |
| 2 |
| 7 |
| 3 |
=8.1÷[(
| 58 |
| 14 |
| 49 |
| 14 |
| 7 |
| 3 |
=8.1÷[
| 9 |
| 14 |
| 7 |
| 3 |
=8.1×
| 2 |
| 3 |
=5.4;
(5)
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
x=2.4;
(6)
| 1 |
| 9 |
| 2 |
| 3 |
| 1 |
| 9 |
| 2 |
| 3 |
| 1 |
| 9 |
| 1 |
| 9 |
| 2 |
| 3 |
| 1 |
| 9 |
x=48.
练习册系列答案
相关题目