能简便的要用简便计算78-58×45724×613×133×8101×192572×(79+58)73×736-73657×1229+1229.-数学

题目简介

能简便的要用简便计算78-58×45724×613×133×8101×192572×(79+58)73×736-73657×1229+1229.-数学

题目详情

能简便的要用简便计算
7
8
-
5
8
×
4
5
7
24
×
6
13
×
13
3
×8
101×
19
25
72×(
7
9
+
5
8
)
73×
7
36
-
7
36
57×
12
29
+
12
29
题型:解答题难度:中档来源:不详

答案

(1)class="stub"7
8
-class="stub"5
8
×class="stub"4
5

=class="stub"7
8
-class="stub"4
8

=class="stub"3
8


(2)class="stub"7
24
×class="stub"6
13
×class="stub"13
3
×8
=class="stub"7
24
×8×(class="stub"6
13
×class="stub"13
3
),
=class="stub"7
3
×2,
=class="stub"14
3


(3)101×class="stub"19
25

=(100+1)×class="stub"19
25

=100×class="stub"19
25
+class="stub"19
25

=76+class="stub"19
25

=76class="stub"19
25


(4)72×(class="stub"7
9
+class="stub"5
8

=72×class="stub"7
9
+72×class="stub"5
8

=56+45,
=101;

(5)73×class="stub"7
36
-class="stub"7
36

=(73-1)×class="stub"7
36

=72×class="stub"7
36

=14;

(6)57×class="stub"12
29
+class="stub"12
29

=(57+1)×class="stub"12
29

=58×class="stub"12
29

=24.

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