计算下列各题,能简算的要简算. (1-1415)×49÷518 30×(115+45+13) 14×35+25÷4 316

2025-04-08 10:52:51
推荐回答(1个)
回答1:

(1)(1-

14
15
)×
4
9
÷
5
18

=
1
15
×
4
9
÷
5
18

=
1
15
×
4
9
×
18
5

=
1
15
×(
4
9
×
18
5
),
=
1
15
×
8
5

=
8
75


(2)30×(
1
15
+
4
5
+
1
3
),
=30×
1
15
+30×
4
5
+30×
1
3

=2+24+10,
=36;

(3)
1
4
×
3
5
+
2
5
÷4,
=
1
4
×
3
5
+
2
5
×
1
4

=
1
4
×(
3
5
+