计算下列各题.860-560÷8×7(5.9+1.65)÷2.5(34+45)×20÷312135÷[(79+13)×32].-数学

题目简介

计算下列各题.860-560÷8×7(5.9+1.65)÷2.5(34+45)×20÷312135÷[(79+13)×32].-数学

题目详情

计算下列各题.
860-560÷8×7(5.9+1.65)÷2.5
3
4
+
4
5
)×20÷
31
21
3
5
÷[(
7
9
+
1
3
)×
3
2
].
题型:解答题难度:中档来源:不详

答案

860-560÷8×7
=860-70×7,
=860-490,
=370;

(5.9+1.65)÷2.5
=7.55÷2.5,
=3.02;

class="stub"3
4
+class="stub"4
5
)×20÷class="stub"31
21

=(class="stub"3
4
×20+class="stub"4
5
×20)÷class="stub"31
21

=(15+16)×class="stub"21
31

=31×class="stub"21
31

=21;

class="stub"3
5
÷[(class="stub"7
9
+class="stub"1
3
)×class="stub"3
2
].
=class="stub"3
5
÷[class="stub"10
9
×class="stub"3
2
],
=class="stub"3
5
÷class="stub"5
3

=class="stub"9
25

更多内容推荐