神机妙算细又巧.113+1213×(52-13)23×[910÷(716-14)]1128+164+132+…+1412×(512+725)×25.-数学

题目简介

神机妙算细又巧.113+1213×(52-13)23×[910÷(716-14)]1128+164+132+…+1412×(512+725)×25.-数学

题目详情

神机妙算细又巧.
1
13
+
12
13
×(
5
2
-
1
3
)    
2
3
×[
9
10
÷(
7
16
-
1
4
)]
1
128
+
1
64
+
1
32
+…+
1
4

12×(
5
12
+
7
25
)×25.
题型:解答题难度:中档来源:不详

答案

(1)class="stub"1
13
+class="stub"12
13
×(class="stub"5
2
-class="stub"1
3
),
=class="stub"1
13
+class="stub"12
13
×class="stub"13
6

=class="stub"1
13
+2,
=2class="stub"1
13


(2)class="stub"2
3
×[class="stub"9
10
÷(class="stub"7
16
-class="stub"1
4
)],
=class="stub"2
3
×[class="stub"9
10
÷class="stub"3
16
],
=class="stub"2
3
×class="stub"24
5

=3class="stub"1
5


(3)class="stub"1
128
+class="stub"1
64
+class="stub"1
32
+…+class="stub"1
4

=class="stub"1
2
-class="stub"1
4
+class="stub"1
4
-class="stub"1
8
…+class="stub"1
16
-class="stub"1
32
+class="stub"1
32
-class="stub"1
64
+class="stub"1
64
-class="stub"1
128

=class="stub"1
2
-class="stub"1
128

=class="stub"63
128


(4)12×(class="stub"5
12
+class="stub"7
25
)×25,
=12×25×class="stub"5
12
+12×25×class="stub"7
25

=125+84,
=209.

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