首页 > 正确，合理计算50+2.5÷43-0.75×0.5-75%523×38+516×223+1023×51621-[(2.75-512)÷13]1285-199．-数学

正确，合理计算50+2.5÷43-0.75×0.5-75%523×38+516×223+1023×51621-[(2.75-512)÷13]1285-199．-数学

题目简介

正确，合理计算50+2.5÷43-0.75×0.5-75%523×38+516×223+1023×51621-[(2.75-512)÷13]1285-199．-数学

题目详情

正确，合理计算
50+2.5÷
4
3
-0.75×0.5-75%
5
23
×
3
8
+
5
16
×
2
23
+
10
23
×
5
16

21-[(2.75-
5
12
)÷
1
3
]
1285-199．
题型：解答题难度：中档来源：不详

答案

（1）50+2.5÷class="stub"4
3
-0.75×0.5-75%
=50+0.75×（2.5-0.5-1）
=50+0.75×1
=50.75；

（2）class="stub"5
23
×class="stub"3
8
+class="stub"5
16
×class="stub"2
23
+class="stub"10
23
×class="stub"5
16

=class="stub"5
23
×class="stub"3
8
+class="stub"5
23
×class="stub"2
16
+class="stub"5
23
×class="stub"10
16

=class="stub"5
23
×（class="stub"3
8
+class="stub"2
16
+class="stub"10
16
）
=class="stub"5
23
×class="stub"9
8

=class="stub"45
184
；

（3）21-[（2.75-class="stub"5
12
）÷class="stub"1
3
]
=21-[class="stub"7
3
÷class="stub"1
3
]
=21-7
=14；

（4）1285-199
=1285-200+1
=1085+1
=1086．

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