tlong dongh tpi pke cara ya... please dongh yg baik hati....

( 1 % = 3 org)
a) 35x3 = 105
b) 15x3 = 45
c) (5+25)x3 = 90
d) (20-15) x 3 = 15
e) (5+20+25) x 3 = 150