问题 解答题
2.25×4
4
5
+77
1
2
×0.48-(9
8
17
×
2
23
+
2
17
×
9
23
)
答案

2.25×4

4
5
+77
1
2
×0.48-(9
8
17
×
2
23
+
2
17
×
9
23
),

=2.25×4.8+77.5×0.48-(9

8
17
×
2
23
+
9
17
×
2
23
),

=2.25×4.8+77.5×4.8-(9

8
17
+
9
17
)×
2
23

=(2.25+7.75)×4.8-10×

2
23

=48-

20
23

=47

3
23

单项选择题
问答题 简答题