题目内容

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
)].
(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
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