问题 解答题
简便运算
0.65-
1
4
+6.35-
3
4
2
9
×
1
4
+0.25+
7
9
×25%
答案

0.65-

1
4
+6.35-
3
4

=0.65+6.35-(

1
4
+
3
4
),

=7-1,

=6;

2
9
×
1
4
+0.25+
7
9
×25%,

=(

2
9
+
7
9
+1)×0.25,

=2×0.25,

=0.5.

单项选择题 A1/A2型题
综合题