问题 解答题
用简便方法计算.
10.25+5.89+0.75+4.11
15
17
÷8+
2
17
×
1
8
答案

10.25+5.89+0.75+4.11

=(10.25+0.75)+(5.89+4.11),

=11+10,

=22;

15
17
÷8+
2
17
×
1
8

=

15
17
×
1
8
+
2
17
×
1
8

=(

15
17
+
2
17
)×
1
8

=1×

1
8

=

1
8

单项选择题
选择题