Question

Tinh bang cach thuan tien nhat :

a) 1/3 + 1/4 + 2/3 + 3/4

b) 1/2 + 1/3 - 1/5 + 1/6

Answer 1

a)1 /3 +1/4+2/3+3/4=\(\frac{1}{3}\)+\(\frac{2}{3}\)+\(\frac{1}{4}\)+\(\frac{3}{4}\)=1+1=2

b)1/2 +/3 -/5 +1/6=4/5

Answer 2

a,1/3+1/4+2/3+3/4   

=(1/3+2/3)+(1/4+3/4)

=      1      +      1

=              2

nha, còn phàn b mình chưa biết

Answer 3

a)\(\frac{1}{3}\)+\(\frac{1}{4}\)+\(\frac{2}{3}\)+\(\frac{3}{4}\)

=(\(\frac{1}{3}\)+\(\frac{2}{3}\))+(\(\frac{1}{4}\)+\(\frac{3}{4}\))

=1+1

=2