脱式计算,能简算的就简算.[1-(310+35)]÷45(1112-34)÷(2-12)(325+7144)×25×144

2024-11-23 13:17:39
推荐回答(1个)
回答1:

(1)[1-(

3
10
+
3
5
)]÷
4
5

=[1-
9
10
4
5

=
1
10
×
5
4

=
1
8


(2)(
11
12
-
3
4
)÷(2-
1
2

=
1
6
×
2
3

=
1
9


(3)(
3
25
+
7
144
)×25×144
=
3
25
×25×144+
7
144
×25×144
=3×144+7×25
=432+175
=607