498+9870÷35420.5-294÷2.8×2.1(23-25)÷(18+512)23÷(34+112×45)35÷[(14+27)×720].-数学

题目简介

498+9870÷35420.5-294÷2.8×2.1(23-25)÷(18+512)23÷(34+112×45)35÷[(14+27)×720].-数学

题目详情

498+9870÷35
420.5-294÷2.8×2.1
2
3
-
2
5
)÷(
1
8
+
5
12

2
3
÷(
3
4
+
1
12
×
4
5

3
5
÷[(
1
4
+
2
7
)×
7
20
].
题型:解答题难度:中档来源:不详

答案

(1)498+9870÷35
=498+282,
=780;

(2)420.5-294÷2.8×2.1
=420.5-220.5,
=200;

(3)(class="stub"2
3
-class="stub"2
5
)÷(class="stub"1
8
+class="stub"5
12

=class="stub"4
15
÷class="stub"13
24

=class="stub"32
65


(4)class="stub"2
3
÷(class="stub"3
4
+class="stub"1
12
×class="stub"4
5

=class="stub"2
3
÷(class="stub"3
4
+class="stub"1
15
),
=class="stub"2
3
÷class="stub"49
60

=class="stub"40
49


(5)class="stub"3
5
÷[(class="stub"1
4
+class="stub"2
7
)×class="stub"7
20
].
=class="stub"3
5
÷[class="stub"15
28
×class="stub"7
20
],
=class="stub"3
5
÷class="stub"3
16

=class="stub"16
5

更多内容推荐