a. (7/15 + 8/15) + (22/12 + 2/12)
= 1 + 24/12
= 1 + 2
=3
b.(9/7 + 5/7) + (16/20 + 4/20)
= 14/7 + 20/20
= 2 + 1
= 3
\(a,\dfrac{7}{15}+\dfrac{22}{12}+\dfrac{8}{15}+\dfrac{2}{12}\\ =\left(\dfrac{7}{15}+\dfrac{8}{15}\right)+\left(\dfrac{22}{12}+\dfrac{2}{12}\right)\\ =\dfrac{15}{15}+\dfrac{24}{12}\\ =1+2\\ =3\\ b,\dfrac{9}{7}+\dfrac{16}{20}+\dfrac{4}{20}+\dfrac{5}{7}\\ =\left(\dfrac{9}{7}+\dfrac{5}{7}\right)+\left(\dfrac{16}{20}+\dfrac{4}{20}\right)\\ =\dfrac{14}{7}+\dfrac{20}{20}\\ =2+1\\ =3\)
a) 7/15 + 22/12 + 8/15 + 2/12
( 7/15 + 8/15) + ( 22/12+ 2/12)
= 1 + 2
= 3
b) 9/7 + 16 / 20 + 4 / 20 + 5/7
( 9/7 + 5/7) + ( 16/20 + 4/20)
= 2 + 1
= 3
a)\(\dfrac{7}{15}+\dfrac{22}{12}+\dfrac{8}{15}+\dfrac{2}{12}=\left(\dfrac{7}{15}+\dfrac{8}{15}\right)+\left(\dfrac{22}{12}+\dfrac{2}{12}\right)=1+2=3\)
b) \(\dfrac{9}{7}+\dfrac{16}{20}+\dfrac{4}{20}+\dfrac{5}{7}=\left(\dfrac{9}{7}+\dfrac{5}{7}\right)+\left(\dfrac{16}{20}+\dfrac{4}{20}\right)=2+1=3\)
a. (7/15 + 8/15) + (22/12 + 2/12) = 1 + 24/12= 1 + 2=3
b.(9/7 + 5/7) + (16/20 + 4/20)= 14/7 + 20/20= 2 + 1= 3
a) 7/15 + 22/12 + 8/15 + 2/12
(7/15 + 8/15) + (22/12 + 2/12)
= 1 + 24/12
= 1 + 2
=3
b) 9/7 + 16 / 20 + 4 / 20 + 5/7
(9/7 + 5/7) + (16/20 + 4/20)
= 14/7 + 20/20
= 2 + 1
= 3