Question

Bai 2

Answer 1

ko chép đầu bài nha

phần in đậm ghi thì ghi ko ghi cũng dc

bài 2:

a=4/5x(6/11-4/11+9/11)

a=4/5x11/11

a=4/5x1

a=1

 

Answer 2

cảm ơn

 

Answer 3

2:

a: \(A=\dfrac{4}{5}\left(\dfrac{6}{11}-\dfrac{4}{11}+\dfrac{9}{11}\right)=\dfrac{4}{5}\cdot\dfrac{11}{11}=\dfrac{4}{5}\)

b: \(B=\dfrac{1}{2}+\dfrac{1}{4}+\dfrac{1}{4}-\dfrac{1}{7}+\dfrac{1}{7}-\dfrac{1}{8}+\dfrac{1}{8}-\dfrac{1}{10}\)

=1/2+1/2-1/10

=1-1/10=9/10