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计算题:(1)(-a2)3+(-a3)2(2)(x2y)4÷(x2y)+(x2y)3(3)(b2n)3(b3)4n÷(b5)n+1(4)(1100×199)200×(100×99)201.

题目详情
计算题:
(1)(-a23+(-a32
(2)(x2y)4÷(x2y)+(x2y)3
(3)(b2n3(b34n÷(b5n+1
(4)(
1
100
×
1
99
200×(100×99)201
▼优质解答
答案和解析
(1)(-a23+(-a32
=-a6+a6
=0; 
(2)(x2y)4÷(x2y)+(x2y)3
=(x24y4÷(x2y)+(x23y3
=x8y4÷(x2y)+x6y3
=x6y3+x6y3
=2x6y3
(3)(b2n3(b34n÷(b5n+1
=b6nb12n÷b5n+5
=b18n÷b5n+5
=b13n-5;  
(4)(
1
100
×
1
99
200×(100×99)201
=(
1
100
×
1
99
×100×99)200×(100×99)
=100×99
=9900.