满足下面等式的方格中的数等于______.()128+1275-4221×0.75÷13+57×1.4(4-223)×3=4.5.-数学

题目简介

满足下面等式的方格中的数等于______.()128+1275-4221×0.75÷13+57×1.4(4-223)×3=4.5.-数学

题目详情

满足下面等式的方格中的数等于______.
()
128
+1
2
7
5-4
2
21
×0.75
÷
1
3
+
5
7
×1.4
(4-2
2
3
)×3
=4.5
题型:填空题难度:中档来源:不详

答案

左边=
()
128
+1class="stub"2
7
5-4class="stub"2
21
×0.75
÷
class="stub"1
3
+class="stub"5
7
×1.4
(4-2class="stub"2
3
)×3

=
()
128
+1class="stub"2
7
5-class="stub"43
14
÷
class="stub"1
3
+1
4

=
()
128
+1class="stub"2
7
class="stub"27
14
÷class="stub"1
3

=[
()
128
+class="stub"9
7
class="stub"14
27
×3

=[
()
128
+class="stub"9
7
class="stub"14
9

=
()
128
×class="stub"14
9
+2

所以
()
128
×class="stub"14
9
+2=4.5

解得(  )=class="stub"1440
7

故答案为:class="stub"1440
7

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