问题 解答题
脱式计算.
①(
5
6
-
1
4
)÷(
1
2
+
2
3
7
15
×14+
7
15
③48÷[(
5
6
-
2
3
)×6]
答案

①(

5
6
-
1
4
)÷(
1
2
+
2
3
),

=

7
12
÷
7
6

=

1
2

7
15
×14+
7
15

=(14+1)×

7
15

=15×

7
15

=7;

③48÷[(

5
6
-
2
3
)×6],

=48÷[

1
6
×6],

=48÷1,

=48.

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