问题 解答题
下面各题,能简算的要简算.
360÷15-2.5×1.4
560÷16÷5
3
7
+
4
7
×
3
4
-
3
4
4.3×99
76÷7.6+2.4
3
8
×[
8
9
÷(
5
6
-
3
4
)].
答案

(1)360÷15-2.5×1.4,

=24-3.5,

=20.5;

(2)560÷16÷5,

=560÷(16×5),

=560÷80,

=7;

(3)

3
7
+
4
7
×
3
4
-
3
4

=

3
7
+
3
7
-
3
4

=

6
7
-
3
4

=

3
28

(4)4.3×99,

=4.3×100-4.3,

=430-4.3,

=425.7;

(5)76÷7.6+2.4,

=10+2.4,

=12.4;

(6)

3
8
×[
8
9
÷(
5
6
-
3
4
)]

=

3
8
×[
8
9
×12
],

=

3
8
×
32
3

=4.

单项选择题
单项选择题