列式计算.(1)甲数的25和乙数的47相等,乙数是14.甲数是多少?(2)34与它的倒数的和去除512,商是多

2025-04-14 05:28:51
推荐回答(1个)
回答1:

(1)14×

4
7
÷
2
5

=8÷
2
5

=20;
答:甲数是20.

(2)
5
12
÷(
3
4
+1÷
3
4
),
=
5
12
÷(
3
4
+
4
3
),
=
5
12
÷
25
12

=
1
5

答:商是
1
5


(3)(45×
3
5
+5)÷
4
5

=(27+5)÷
4
5

=32÷
4
5

=40;
答:这个数是40.