(1)(-334)-3-(212)-1+(-12)2(2)[(0.1)-2+(0.01)-1]×(-110)-3(3)(3x-2)-1÷(12x)-2•(3y-12x)2(4)(a-2-b-2)÷(a

题目简介

(1)(-334)-3-(212)-1+(-12)2(2)[(0.1)-2+(0.01)-1]×(-110)-3(3)(3x-2)-1÷(12x)-2•(3y-12x)2(4)(a-2-b-2)÷(a

题目详情

(1)(-3
3
4
)-3-(2
1
2
)-1+(-
1
2
)2

(2)[(0.1)-2+(0.01)-1(-
1
10
)-3

(3)(3x-2-1÷(
1
2
x)-2
(
3y-1
2x
)2

(4)(a-2-b-2)÷(a-1-b-1
(5)x-2y-2÷(x-2-y-2
(6)(2x-2+y)2-(2x-2-y)2
题型:解答题难度:中档来源:不详

答案

(1)(-3class="stub"3
4
)-3-(2class="stub"1
2
)-1+(-class="stub"1
2
)2

=-class="stub"64
3375
+class="stub"2
5
+class="stub"1
4

=class="stub"8519
13500


(2)[(0.1)-2+(0.01)-1]×(-class="stub"1
10
)-3

=[100+100]×(-1000)
=200×(-1000)
=-200000;

(3)(3x-2)-1÷(class="stub"1
2
x)-2
(
3y-1
2x
)2

=
x2
3
x2
4
class="stub"9
4x2y2

=
3x2
16y2


(4)(a-2-b-2)÷(a-1-b-1)
=(class="stub"1
a2
-class="stub"1
b2
)÷(class="stub"1
a
-class="stub"1
b

=
(b+a)(b-a)
a2b2
class="stub"ab
b-a

=class="stub"a+b
ab


(5)x-2y-2÷(x-2-y-2)
=class="stub"1
x2y2
÷(class="stub"1
x2
-class="stub"1
y2

=class="stub"1
x2y2
÷
y2-x2
x2y2

=class="stub"1
(y+x)(y-x)


(6)(2x-2+y)2-(2x-2-y)2.
=4x-4+2x-2y+y2-(4x-4-2x-2y+y2)
=4x-4+2x-2y+y2-4x-4+2x-2y-y2
=4x-2y.

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