题目内容

用你喜欢的方法计算.
67
10
×
5
4
+1.25×3.3
75+4.2+8.25+5.8
5
8
-(
1
4
+
3
5
)÷
11
5
408+540÷18×2468÷[1÷(0.1-0.09)]
1
15
+
1
18
)×90-11.
(1)
67
10
×
5
4
+1.25×3.3,
=8.375+4.125,
=12.5;

(2)75+4.2+8.25+5.8,
=75+8.25+(4.2+5.8),
=83.25+10,
=93.25;

(3)
5
8
-(
1
4
+
3
5
)÷
11
5

=
5
8
-
17
20
×
5
11

=
5
8
-
17
44

=
21
88


(4)408+540÷18×24,
=408+540÷18×24,
=408+720,
=1128;

(5)68÷[1÷(0.1-0.09)],
=68÷[1÷0.01],
=68÷100,
=0.68;

(6)(
1
15
+
1
18
)×90-11,
=
1
15
×90+
1
18
×90-11,
=6+5-11,
=0.
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