(1)(25+58)÷35+23=______;(2)若12x=52×50%+815x,则x=______.-数学

题目简介

(1)(25+58)÷35+23=______;(2)若12x=52×50%+815x,则x=______.-数学

题目详情

(1)(
2
5
+
5
8
)÷
3
5
+
2
3
=______;
(2)若
1
2
x=52×50%+
8
15
x,则x=______.
题型:填空题难度:中档来源:不详

答案

(1)(class="stub"2
5
+class="stub"5
8
)÷class="stub"3
5
+class="stub"2
3

=class="stub"41
40
÷class="stub"3
5
+class="stub"2
3

=class="stub"41
40
×class="stub"5
3
+class="stub"2
3

=class="stub"41
24
+class="stub"16
24

=class="stub"57
24

=2class="stub"3
8


(2)若class="stub"1
2
x=52×50%+class="stub"8
15
x,
class="stub"1
2
x=52×0.5+class="stub"8
15
x,
class="stub"1
2
x-class="stub"8
15
x=26,
-class="stub"1
30
x=26,
-class="stub"1
30
x×30=26×30,
x=-780;
故答案为:2class="stub"3
8
,-780.

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