(4/7+2/5)-1/3= 2/5+4/15= 2/3+3/10= 5/6-3/5=

a. 67/105  b.2/3 c.29/30 d.7/30

a. ( 4/7 + 2/5 ) - 1/3 = ( 60/105 + 42/105 ) - 35/105
= 102/105 - 35/105 = 67/105
b. 2/5 + 4/15 = 6/15 + 4/15 = 10/15 = 2/3
c. 2/3 + 3/10 = 20/30 + 9/30 = 29/30
d. 5/6 - 3/5 = 25/30 - 18/30 = 7/30

maaf klo salah hitung ..