问题 解答题
脱式计算
(384+336)÷15×13

(11+30.6)÷16+16.5
2-
5
4
×
8
15
-
1
3
〔1-(
1
6
+
1
4
)〕÷
7
10
答案

(1)(384+336)÷15×13,

=720÷15×13,

=48×13,

=624;

(2)(11+30.6)÷16+16.5,

=41.6÷16+16.5,

=2.6+16.5,

=19.1;

(3)2-

5
4
×
8
15
-
1
3

=2-

2
3
-
1
3

=2-(

2
3
+
1
3
),

=2-1,

=2;

(4)[1-(

1
6
+
1
4
)]÷
7
10

=[1-

5
12
7
10

=

7
12
÷
7
10

=

5
6

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