问题 解答题
用递等式计算.
1000-4920÷241.1×(20-19.3)+2.1
1
3
÷[(
1
2
+
1
3
3
5
]
答案

(1)1000-4920÷24,

=1000-205,

=795;

(2)1.1×(20-19.3)+2.1,

=1.1×0.7+2.1,

=0.77+2.1,

=2.87;

(3)

1
3
÷[(
1
2
+
1
3
3
5
],

=

1
3
÷[
5
6
×
3
5
],

=

1
3
÷
1
2

=

2
3

单项选择题 A1/A2型题
判断题