问题 解答题
下面各题,怎样计算简便就怎样计算.
2002-540÷36×96
7.28-(1.28+0.25)
2.25×1.8+17.5×0.18
36×(
2
9
+
7
12
-
1
4

7
15
÷[1-(
4
5
-
2
3
)].
答案

(1)2002-540÷36×96

=2002-540÷9÷4×96,

=2002-60÷4×96,

=2002-15×6×16,

=2002-90×16,

=2002-1440,

=562;

(2)7.28-(1.28+0.25)

=7.28-1.28-0.25,

=6-0.25,

=5.75;

(3)2.25×1.8+17.5×0.18

=2.25×1.8+1.75×1.8,

=(2.25+1.75)×1.8,

=4×1.8,

=7.2;

(4)36×(

2
9
+
7
12
-
1
4

=36×

2
9
+36×
7
12
-36×
1
4

=8+21-9,

=20;

(5)

7
15
÷[1-(
4
5
-
2
3
)].

=

7
15
÷[1-(
12
15
-
10
15
)],

=

7
15
÷[1-
2
15
],

=

7
15
×
15
13

=

7
13

单项选择题
单项选择题