脱式计算,能简算的要简算.(1)0.6+6×32×0.25(2) ( 4 5 + 1 4 ) ÷ 7

2025-04-29 08:01:12
推荐回答(1个)
回答1:

(1)0.6+6×32×0.25,
=0.6+(6×8)×(4×0.25),
=0.6+48×1,
=0.6+48,
=48.6;

(2) (
4
5
+
1
4
)
÷
7
3
-
1
4

=
21
20
×
3
7
-
1
4

=
9
20
-
1
4

=
1
5


(3)36×(
7
9
+
1
4
-
5
6
),
=36×
7
9
+36×
1
4
-36×
5
6

=28+9-30,
=7;

(4)
8
9
×[
7
8
-(
7
16
+
1
8
)],
=
8
9
×[
7
8
-
7
16
+
1
8
],
=
8
9
×[
7
8
+
1
8
-
7
16
],
=
8
9
×[1-
7
16
],
=
8
9
×
9
16

=
1
2