找窍门,怎样算简便就怎样算.(1)56×65-910÷95(2)4-511-711(3)315×[(123+15)×217](4)[34-0÷(17+213)]×113(5)201100×83+1.7

题目简介

找窍门,怎样算简便就怎样算.(1)56×65-910÷95(2)4-511-711(3)315×[(123+15)×217](4)[34-0÷(17+213)]×113(5)201100×83+1.7

题目详情

找窍门,怎样算简便就怎样算.
(1)
5
6
×
6
5
-
9
10
÷
9
5

(2)4-
5
11
-
7
11

(3)3
1
5
×[(1
2
3
+
1
5
)×2
1
7
]
(4)[
3
4
-0÷(
1
7
+
2
13
)]×1
1
3

(5)20
1
100
×83+1.7×200
1
10

(6)
4
5
÷[(
5
8
-
1
2
)÷
5
8
].
题型:解答题难度:中档来源:不详

答案

(1)class="stub"5
6
×class="stub"6
5
-class="stub"9
10
÷class="stub"9
5

=1-class="stub"9
10
×class="stub"5
9

=1-class="stub"1
2

=class="stub"1
2


(2)4-class="stub"5
11
-class="stub"7
11

=4-(class="stub"5
11
+class="stub"7
11
),
=4-1,
=3;

(3)3class="stub"1
5
×[(1class="stub"2
3
+class="stub"1
5
)×2class="stub"1
7
]
=class="stub"16
5
×[(class="stub"5
3
+class="stub"1
5
)×class="stub"15
7
],
=class="stub"16
5
×[class="stub"5
3
×class="stub"15
7
+class="stub"1
5
×class="stub"15
7
],
=class="stub"16
5
×[class="stub"25
7
+class="stub"3
7
],
=class="stub"16
5
×4,
=12class="stub"4
5


(4)[class="stub"3
4
-0÷(class="stub"1
7
+class="stub"2
13
)]×1class="stub"1
3

=[class="stub"3
4
-0
class="stub"4
3

=class="stub"3
4
×class="stub"4
3

=1;

(5)20class="stub"1
100
×83+1.7×200class="stub"1
10

=20.01×83+1.7×200.1
=200.1×8.3+1.7×200.1,
=(8.3+1.7)×200.1,
=10×200.1,
=2001;

(6)class="stub"4
5
÷[(class="stub"5
8
-class="stub"1
2
)÷class="stub"5
8
]
=class="stub"4
5
÷[(class="stub"5
8
-class="stub"1
2
)×class="stub"8
5
],
=class="stub"4
5
÷[class="stub"5
8
×class="stub"8
5
-class="stub"1
2
×class="stub"8
5
],
=class="stub"4
5
÷[1-class="stub"4
5
],
=class="stub"4
5
÷class="stub"1
5

=4.

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