问题 解答题
4.05-2.86-0.14
75×60%+24×
3
5
+0.6

1375+450÷18×25
120÷[(
11
6
+
2
3
)×
3
10
]
3
5
-
1
4
)÷
3
2
×
15
7

8÷[(
8
5
-
2
3
)×
2
7
].
答案

(1)4.05-2.86-0.14

=4.05-(2.86+0.14),

=4.05-3,

=1.05;

(2)75×60%+24×

3
5
+0.6

=75×0.6+24×0.6+0.6,

=(75+24+1)×0.6,

=100×0.6,

=60;

(3)1375+450÷18×25

=1375+25×25,

=1375+625,

=2000;

(4)120÷[(

11
6
+
2
3
3
10
]

=120÷[

11
6
×
3
10
+
2
3
×
3
10
],

=120÷[

11
20
+
4
20
],

=120×

4
3

=160;

(5)(

3
5
-
1
4
3
2
×
15
7

=(

3
5
-
1
4
2
3
×
15
7

=

3
5
×
2
3
×
15
7
-
1
4
×
2
3
×
15
7

=

6
7
-
10
28

=

1
2

(6)8÷[(

8
5
-
2
3
2
7
]

=8÷[

14
15
×
2
7
],

=

15
4

=30.

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