试题与答案

计算下面各题:(能简便计算的要简便计算) (1)88×(38+144)(2)10

题型:解答题

题目:

计算下面各题:(能简便计算的要简便计算)
(1)88×(
3
8
+
1
44
(2)
10
21
×
12
25
×
7
8
(3)
23
25
×
1
4
+
1
4
×
2
25
(4)
3
4
×(
9
10
-
5
6
(5)
14
15
×14+
14
15
(6)4-
8
25
×
15
4

答案:

(1)88×(

3
8
+
1
44
),

=88×

3
8
+88×
1
44

=33+2,

=35;

(2)

10
21
×
12
25
×
7
8

=

8
35
×
7
8

=

1
5

(3)

23
25
×
1
4
+
1
4
×
2
25

=(

23
25
+
2
25
)×
1
4

=1×

1
4

=

1
4

(4)

3
4
×(
9
10
-
5
6
),

=

3
4
×
1
15

=

1
20

(5)

14
15
×14+
14
15

=

14
15
×(14+1),

=

14
15
×15,

=14;

(6)4-

8
25
×
15
4

=4-

6
5

=2

4
5

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