问题 解答题
计算:
①108-4830÷69
1
4
×
5
13
+
3
4
×
5
13

③168-7.5-2.5+32
④(
1
4
-
1
5
÷4)÷
3
10

7
11
+
4
11
×(
11
12
×
2
3
答案

①108-4830÷69,

=108-70,

=38;

1
4
×
5
13
+
3
4
×
5
13

=(

1
4
+
3
4
)×
5
13

=1×

5
13

=

5
13

③168-7.5-2.5+32,

=(168+32)-(7.5+2.5),

=200-10,

=190;

④(

1
4
-
1
5
÷4)÷
3
10

=(

1
4
-
1
20
)÷
3
10

=

1
5
÷
3
10

=

2
3

7
11
+
4
11
×(
11
12
×
2
3
),

=

7
11
+
4
11
×
11
12
×
2
3

=

7
11
+
1
3
×
2
3

=

7
11
+
2
9

=

85
99

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