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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)
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510÷[42×(
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▼优质解答
答案和解析
(1)
×
+
÷4,
=
×
+
×
,
=
×(
+
),
=
×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×(
−
)],
=510÷[42×
−42×
],
=510÷[35-18],
=510÷17,
=30;
(4)
+(
−
)÷
,
=
+
÷
,
=
+
,
=
.
(1)
17 |
24 |
3 |
4 |
17 |
24 |
=
17 |
24 |
3 |
4 |
17 |
24 |
1 |
4 |
=
17 |
24 |
3 |
4 |
1 |
4 |
=
17 |
24 |
=
17 |
24 |
(2)
1 |
2 |
=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 |
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 |
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