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计算下列各题,能简算的要简算.(1)(3+34÷34+3)-(7×16÷7×16)(2)58×691617+50×18+18×517(3)(815+157+611)÷(415+67+311)(4)25×[35÷(35+925)](5)28×[1÷(3110-3.09)]÷1.4(6)[19.08
题目详情
计算下列各题,能简算的要简算.
(1)(3+
| (2)
| ||||||||||||||||||||
(3)(
| (4)
| ||||||||||||||||||||
(5)28×[1÷(3
| (6)[19.08+(3.2-0.299÷0.23)]×
|
▼优质解答
答案和解析
(1)(3+
÷
+3)-( 7×
÷7×
)
=(3+1+3)-
=7-
=6
;
(2)
×69
+50×
+
×
=5×69
×
+50×
+
×
=(5×69
+50+
)×
=(5×70-5×
+50+
)×
=400×
=50;
(3)(
+1
+
)÷(
+
+
)
=2×(
+
+
)÷(
+
+
)
=2;
(4)
×[
÷(
+
)]
=
×[
×
]
=
×
=
;
(5)28×[1÷(3
-3.09)]÷1.4
=28×[1÷0.01]÷1.4
=28×100÷1.4
=2800÷1.4
=2000;
(6)[19.08+(3.2-0.299÷0.23)]×
=[19.08+(3.2-1.3)]×
=[19.08+1.9]×
=20.98×
=5.245.
3 |
4 |
3 |
4 |
1 |
6 |
1 |
6 |
=(3+1+3)-
1 |
36 |
=7-
1 |
36 |
=6
35 |
36 |
(2)
5 |
8 |
16 |
17 |
1 |
8 |
1 |
8 |
5 |
17 |
=5×69
16 |
17 |
1 |
8 |
1 |
8 |
1 |
8 |
5 |
17 |
=(5×69
16 |
17 |
5 |
17 |
1 |
8 |
=(5×70-5×
1 |
17 |
5 |
17 |
1 |
8 |
=400×
1 |
8 |
=50;
(3)(
8 |
15 |
5 |
7 |
6 |
11 |
4 |
15 |
6 |
7 |
3 |
11 |
=2×(
4 |
15 |
6 |
7 |
3 |
11 |
4 |
15 |
6 |
7 |
3 |
11 |
=2;
(4)
2 |
5 |
3 |
5 |
3 |
5 |
9 |
25 |
=
2 |
5 |
3 |
5 |
25 |
24 |
=
2 |
5 |
5 |
8 |
=
1 |
4 |
(5)28×[1÷(3
1 |
10 |
=28×[1÷0.01]÷1.4
=28×100÷1.4
=2800÷1.4
=2000;
(6)[19.08+(3.2-0.299÷0.23)]×
1 |
4 |
=[19.08+(3.2-1.3)]×
1 |
4 |
=[19.08+1.9]×
1 |
4 |
=20.98×
1 |
4 |
=5.245.
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