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计算,能简算的要简算.5.6×99+5.312.5×32×2565-0.25-3435÷[(15+13)÷29].

题目详情
计算,能简算的要简算.
5.6×99+5.3

12.5×32×25
6
5
-0.25-
3
4
3
5
÷[(
1
5
+
1
3
2
9
] .
▼优质解答
答案和解析
(1)5.6×99+5.3,
=5.6×(100-1)+5.3,
=560-5.6+5.3,
=560-(5.6-5.3),
=560-0.3,
=559.7;

(2)12.5×32×25,
=12.5×8×4×25,
=(12.5×8)×(4×25),
=100×100,
=10000;

(3)
6
5
-0.25-
3
4

=
6
5
-
1
4
-
3
4

=
6
5
-(
1
4
+
3
4
),
=
6
5
-1,
=
1
5


(4)
3
5
÷[(
1
5
+
1
3
)÷
2
9
],
=
3
5
÷[
8
15
÷
2
9
],
=
3
5
÷[
8
15
×
9
2
],
=
3
5
÷
12
5

=
3
5
×
5
12

=
1
4