问题 解答题
计算.
①92×13+28
②4.2÷1.5-0.36
③78×
3
79

④1÷
1
4
-
1
4
÷1
2
5
×5÷
2
5
×5
⑥2-
8
15
÷
4
9

⑦36×(
1
6
+
2
3
答案

①92×13+28

=1196+28,

=1224;

②4.2÷1.5-0.36

=2.8-0.36,

=2.44;

③78×

3
79

=(79-1)×

3
79

=79×

3
79
-1×
3
79

=3-

3
79

=2

76
79

④1÷

1
4
-
1
4
÷1

=4-

1
4

=3

3
4

2
5
×5÷
2
5
×5

=

2
5
÷
2
5
×5×5,

=1×5×5,

=25;

⑥2-

8
15
÷
4
9

=2-

6
5

=

4
5

⑦36×(

1
6
+
2
3

=36×

1
6
+36×
2
3

=6+24,

=30.

单项选择题
单项选择题