题目内容

脱式计算(能简便的要简便)
(11-
2
3
×
3
2
)÷15
(84÷4-0.01)×(1-
1
4
5
3
÷
4
5
-
5
4
×
2
3
5
8
×0.25+0.375×
1
4
+
1
4
3
2
÷[
5
6
×(1-
1
3
)]
7
9
÷[(4.5-5%×70)÷
9
7
].
(1)(11-
2
3
×
3
2
)÷15
=(11-1)÷15
=10÷15
=
2
3


(2)(84÷4-0.01)×(1-
1
4

=(21-0.01)×(1-
1
4

=20.99×
3
4

=15.7425;

(3)
5
3
÷
4
5
-
5
4
×
2
3

=
5
3
×
5
4
-
5
4
×
2
3

=(
5
3
-
2
3
)×
5
4

=1×
5
4

=
5
4


(4)
5
8
×0.25+0.375×
1
4
+
1
4

=
5
8
×0.25+0.375×0.25+0.25
=(
5
8
+0.375+1)×0.25
=2×0.25
=0.5;

(5)
3
2
÷[
5
6
×(1-
1
3
)]
=
3
2
÷[
5
6
×
2
3
]
=
3
2
÷
5
9

=
27
10


(6)
7
9
÷[(4.5-5%×70)÷
9
7
]
=
7
9
÷[(4.5-3.5)÷
9
7
]
=
7
9
÷[1÷
9
7
]
=
7
9
÷
7
9

=1.
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