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计算下列各题.(能简算的要简算)1724×34+1724÷412×3.2+5.6×0.5+1.2×50%510÷[42×(56−37)]1516+(716−14)÷12.

题目详情
计算下列各题.(能简算的要简算)
17
24
×
3
4
+
17
24
÷4
1
2
×3.2+5.6×0.5+1.2×50%
510÷[42×(
5
6
3
7
)]
15
16
+(
7
16
1
4
1
2
▼优质解答
答案和解析

(1)
17
24
×
3
4
+
17
24
÷4,
=
17
24
×
3
4
+
17
24
×
1
4

=
17
24
×(
3
4
+
1
4
),
=
17
24
×1,
=
17
24


(2)
1
2
×3.2+5.6×0.5+1.2×50%,
=0.5×3.2+5.6×0.5+1.2×0.5,
=0.5×(3.2+5.6+1.2),
=0.5×10,
=5;

(3)510÷[42×(
5
6
3
7
)],
=510÷[42×
5
6
−42×
3
7
],
=510÷[35-18],
=510÷17,
=30;

(4)
15
16
+(
7
16
1
4
1
2

=
15
16
+
3
16
÷
1
2

=
15
16
+
3
8

=
21
16