用你喜欢的方法算:14+34×134013×39×78057×14+34×57(14+15)×4×52005×2003200424×5143+51×1943.-数学

题目简介

用你喜欢的方法算:14+34×134013×39×78057×14+34×57(14+15)×4×52005×2003200424×5143+51×1943.-数学

题目详情

用你喜欢的方法算:
1
4
+
3
4
×
1
3
40
13
×39×
7
80
5
7
×
1
4
+
3
4
×
5
7
1
4
+
1
5
)×4×5
2005×
2003
2004
24×
51
43
+51×
19
43
题型:解答题难度:中档来源:不详

答案


(1)class="stub"1
4
+class="stub"3
4
×class="stub"1
3

=class="stub"1
4
+class="stub"1
4

=class="stub"1
2


(2)class="stub"40
13
×39×class="stub"7
80

=120×class="stub"7
80

=class="stub"21
2


(3)class="stub"5
7
×class="stub"1
4
+class="stub"3
4
×class="stub"5
7

=class="stub"5
7
×(class="stub"1
4
+class="stub"3
4
),
=class="stub"5
7


(4)(class="stub"1
4
+class="stub"1
5
)×4×5,
=class="stub"1
4
×4×5+class="stub"1
5
×4×5,
=5+4,
=9;

(5)2005×class="stub"2003
2004

=(2004+1)×class="stub"2003
2004

=2004×class="stub"2003
2004
+1×class="stub"2003
2004

=2003+class="stub"2003
2004

=2003class="stub"2003
2004


(6)24×class="stub"51
43
+51×class="stub"19
43

=24×class="stub"51
43
+19×class="stub"51
43

=(24+19)×class="stub"51
43

=43×class="stub"51
43

=51.

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