精简巧算:(56+38)×481214÷255978÷177817÷23+123×917.-数学

题目简介

精简巧算:(56+38)×481214÷255978÷177817÷23+123×917.-数学

题目详情

精简巧算:
5
6
+
3
8
)×48
12
1
4
÷25
59
78
÷
1
77
 
8
17
÷23+
1
23
×
9
17
题型:解答题难度:中档来源:不详

答案

(1)(class="stub"5
6
+class="stub"3
8
)×48,
=class="stub"5
6
×48+class="stub"3
8
×48,
=40+18,
=58;

(2)12class="stub"1
4
÷25,
=12.25÷25,
=0.49;

(3)class="stub"59
78
÷class="stub"1
77

=class="stub"59
78
×77,
=class="stub"59
78
×(78-1),
=class="stub"59
78
×78-1×class="stub"59
78

=59-class="stub"59
78

=58class="stub"19
78


(4)class="stub"8
17
÷23+class="stub"1
23
×class="stub"9
17

=class="stub"8
17
×class="stub"1
23
+class="stub"1
23
×class="stub"9
17

=(class="stub"8
17
+class="stub"9
17
)×class="stub"1
23

=class="stub"1
23

更多内容推荐