计算,得数要约成最简分数310+510=916-716=78-18=1121+1021=-数学

题目简介

计算,得数要约成最简分数310+510=916-716=78-18=1121+1021=-数学

题目详情

计算,得数要约成最简分数
3
10
+
5
10
=
9
16
-
7
16
=
7
8
-
1
8
=
11
21
+
10
21
=
题型:解答题难度:中档来源:不详

答案

(1)class="stub"3
10
+class="stub"5
10

=class="stub"3+5
10

=class="stub"8
10

=class="stub"4
5


(2)class="stub"9
16
-class="stub"7
16

=class="stub"9-7
16

=class="stub"2
16

=class="stub"1
8


(3)class="stub"7
8
-class="stub"1
8

=class="stub"7-1
8

=class="stub"6
8

=class="stub"3
4


(4)class="stub"11
21
+class="stub"10
21

=class="stub"11+10
21

=class="stub"21
21

=1.

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