问题 解答题
下面各题怎样简便就怎样算.
3.7×99+3.7
3
4
+
1
6
-
3
8

5.37-1.47-2.53
105×(
1
3
+
1
5

13+45÷9
2
3
×
5
8
+
1
3
×
5
8
答案

(1)3.7×99+3.7,

=3.7×(99+1),

=3.7×100,

=370;

(2)

3
4
+
1
6
-
3
8

=

18
24
+
4
24
-
9
24

=

13
24

(3)5.37-1.47-2.53,

=5.37-(1.47+2.53),

=5.37-4,

=1.37;

(4)105×(

1
3
+
1
5
),

=105×

1
3
+105×
1
5

=35+21,

=56;

(5)13+45÷9,

=13+5,

=18;

(6)

2
3
×
5
8
+
1
3
×
5
8

=(

2
3
+
1
3
)×
5
8

=1×

5
8

=

5
8

单项选择题
单项选择题