(1)(2.65?114)÷[(4.5?313)×0.48](2)27.27-3.8×2.4+3.18÷0.12(3)(138+225+258)÷(1?335)(4)[6
(1)(2.65?114)÷[(4.5?313)×0.48](2)27.27-3.8×2.4+3.18÷0.12(3)(138+225+258)÷(1?335)(4)[6...
(1)(2.65?114)÷[(4.5?313)×0.48](2)27.27-3.8×2.4+3.18÷0.12(3)(138+225+258)÷(1?335)(4)[67.5÷(145?1.35)?14434]×137.
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(1)(2.65-1
)÷[(4.5? 3
)×0.48]
=
÷[
×
]
=
×
=
;
(2)27.27-3.8×2.4+3.18÷0.12(1)
=27.27-9.12+26.5
=18.15+26.5
=44.65;
(3)(1
+2
+ 2
)÷(1-
)
=(1
+ 2
+2
)×
=
×
=7;
(4)[67.5÷(1
)-144
]×1
=[
÷ 1
-144
]×
=[32
-144
]×
=?
×
=?160
.
1 |
4 |
1 |
3 |
=
7 |
5 |
7 |
6 |
12 |
25 |
=
7 |
5 |
25 |
14 |
=
5 |
2 |
(2)27.27-3.8×2.4+3.18÷0.12(1)
=27.27-9.12+26.5
=18.15+26.5
=44.65;
(3)(1
3 |
8 |
2 |
5 |
5 |
8 |
3 |
35 |
=(1
15 |
40 |
16 |
40 |
25 |
40 |
35 |
32 |
=
256 |
40 |
35 |
32 |
=7;
(4)[67.5÷(1
4 |
5?1.35 |
3 |
4 |
3 |
7 |
=[
135 |
2 |
80 |
73 |
3 |
4 |
10 |
7 |
=[32
7 |
34 |
3 |
4 |
10 |
7 |
=?
7653 |
68 |
10 |
7 |
=?160
185 |
238 |
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