问题 解答题
脱式计算:
5025-2940÷28×7;
3.68×[1÷(2.1-2.09)];
5-5×
2
5
+
3
5

5
11
×[(
2
5
+
1
3
)÷
5
6
].
答案

5025-2940÷28×7,

=5025-105×7,

=5025-735,

=4290;

3.68×[1÷(2.1-2.09)],

=3.68×[1÷0.01],

=3.68×100,

=368;

5-5×

2
5
+
3
5

=5-2+

3
5

=3

3
5

5
11
×[(
2
5
+
1
3
)÷
5
6
],

=

5
11
×[(
6
15
+
5
15
)×
6
5
],

=

5
11
×[
11
15
×
6
5
],

=

5
11
×
22
25

=

2
5

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