计算下面各题:(能简便计算的要简便计算)(1)88×(38+144)(2)1021×1225×78(3)2325×14+14×225(4)34×(910-56)(5)1415×14+1415(6)4-

题目简介

计算下面各题:(能简便计算的要简便计算)(1)88×(38+144)(2)1021×1225×78(3)2325×14+14×225(4)34×(910-56)(5)1415×14+1415(6)4-

题目详情

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
题型:解答题难度:中档来源:不详

答案

(1)88×(class="stub"3
8
+class="stub"1
44
),
=88×class="stub"3
8
+88×class="stub"1
44

=33+2,
=35;

(2)class="stub"10
21
×class="stub"12
25
×class="stub"7
8

=class="stub"8
35
×class="stub"7
8

=class="stub"1
5


(3)class="stub"23
25
×class="stub"1
4
+class="stub"1
4
×class="stub"2
25

=(class="stub"23
25
+class="stub"2
25
)×class="stub"1
4

=1×class="stub"1
4

=class="stub"1
4


(4)class="stub"3
4
×(class="stub"9
10
-class="stub"5
6
),
=class="stub"3
4
×class="stub"1
15

=class="stub"1
20


(5)class="stub"14
15
×14+class="stub"14
15

=class="stub"14
15
×(14+1),
=class="stub"14
15
×15,
=14;

(6)4-class="stub"8
25
×class="stub"15
4

=4-class="stub"6
5

=2class="stub"4
5

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