问题 解答题
脱式计算,能简算的要简算:
3-
5
18
×
27
40
-
13
16
=
7
9
÷
11
5
+
2
9
×
5
11
=
65×101-65=
70.2÷[(5.3-1.4)×0.2]=45×
5
44
=
1
4
×4÷
1
4
×4=
答案

(1)3-

5
18
×
27
40
-
13
16

=3-

3
16
-
13
16

=3-(

3
16
+
13
16
),

=3-1,

=2;

(2)

7
9
÷
11
5
+
2
9
×
5
11

=

7
9
×
5
11
+
2
9
×
5
11

=

5
11
×(
7
9
+
2
9
),

=

5
11

(3)65×101-65,

=65×(101-1),

=65×100,

=6500;

(4)70.2÷[(5.3-1.4)×0.2],

=70.2÷(3.9×0.2),

=70.2÷0.78,

=90;

(5)45×

5
44

=44×

5
44
+
5
44

=5

5
44

(6)

1
4
×4÷
1
4
×4,

=1×4×4,

=16.

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