问题 解答题
脱式计算
5
11
×[(
2
5
+
1
3
)÷
5
6
]
914-316÷79×208
(1-
1
5
÷
1
3
)×
15
16

5
6
÷[1-(
3
4
+
1
12
)].
答案

(1)

5
11
×[(
2
5
+
1
3
)÷
5
6
],

=

5
11
×[
11
15
÷
5
6
],

=

5
11
×[
11
15
×
6
5
],

=

5
11
×
11
15
×
6
5

=

2
5

(2)914-316÷79×208,

=914-4×208,

=914-832,

=82;

(3)(1-

1
5
÷
1
3
)×
15
16

=(1-

1
5
×3)×
15
16

=(1-

3
5
)×
15
16

=

2
5
×
15
16

=

3
8

(4)

5
6
÷[1-(
3
4
+
1
12
)],

=

5
6
÷[1-
5
6
],

=

5
6
÷
1
6

=

5
6
×6,

=5.

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