用递等式计算①(23-25)÷(18+512)②(45+14)÷73+710③253+292÷73.-数学

题目简介

用递等式计算①(23-25)÷(18+512)②(45+14)÷73+710③253+292÷73.-数学

题目详情

用递等式计算
①(
2
3
-
2
5
)÷(
1
8
+
5
12

②(
4
5
+
1
4
)÷
7
3
+
7
10

③253+292÷73.
题型:解答题难度:中档来源:不详

答案

①(class="stub"2
3
-class="stub"2
5
)÷(class="stub"1
8
+class="stub"5
12
),
=(class="stub"10
15
-class="stub"6
15
)÷(class="stub"3
24
+class="stub"10
24
),
=class="stub"4
15
÷class="stub"13
24

=class="stub"4
15
×class="stub"24
13

=class="stub"32
65


②(class="stub"4
5
+class="stub"1
4
)÷class="stub"7
3
+class="stub"7
10

=(class="stub"16
20
+class="stub"5
20
)÷class="stub"7
3
+class="stub"7
10

=class="stub"21
20
×class="stub"3
7
+class="stub"7
10

=class="stub"9
20
+class="stub"14
20

=1class="stub"3
20


③253+292÷73,
=253+4,
=257.

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