问题 解答题
怎样算简便就怎样算.
①2.6×(2.205÷2.1)
1
3
+
2
3
×
5
6
+
4
9

16
27
×5+
11
27
÷
1
5
答案

①2.6×(2.205÷2.1),

=2.6×1.05,

=2.73;

1
3
+
2
3
×
5
6
+
4
9

=

1
3
+
5
9
+
4
9

=

1
3
+(
5
9
+
4
9
),

=

1
3
+1,

=1

1
3

16
27
×5+
11
27
÷
1
5

=

16
27
×5+
11
27
×5,

=(

16
27
+
11
27
)×5,

=1×5,

=5.

问答题
单项选择题