用自己喜欢的方法计算下面各题.(1)58×15+58=(2)2?613÷926?23=(3)(12+13?14)×12

2025-03-07 02:32:54
推荐回答(1个)
回答1:

(1)
5
8
×15+
5
8

=(15+1)×
5
8

=16×
5
8

=10;

(2)2?
6
13
÷
9
26
?
2
3

=2-
6
13
×
26
9
-
2
3

=2-1
1
3
-
2
3

=2-(1
1
3
+
2
3
),
=2-2,
=0;

(3)(
1
2
+
1
3
?
1
4
)×12
=
1
2
×12+
1
3
×12-
1
4
×12,
=6+4-3,
=7.