Question

Giúp m nha mn nhanh nhất nhaa

Answer 1

a: =(3/7+4/7)+(4/9+5/9)=1+1=2

b: =(1/5+4/5)+(4/11+7/11)=1+1=2

c: =(1+4)/15+(5+7)/18=1/3+2/3=1

d: =(1/8+3/8)+(1/12+5/12)=1/2+1/2=1

Answer 2

\(a)(3/7+4/7)+(4/9+5/9)=1+1=2\)

\(b)(1/5+4/5)+(4/11+7/11)=1+1=2\)

\(c)(1/15+4/15)+(5/18+7/18)=1/3+2/3=1\)

\(d)(1/8+3/8)+(1/12+5/12)=1/2+1/2=1\)

Answer 3

(3/7+4/7)+(4/9+5/9)=1+1=2

(1/5+4/5)+(4/11+7/11)=1+1=2

(1+4)/15+(5+7)/18=1/3+2/3=1

(1/8+3/8)+(1/12+5/12)=1/2+1/2=1