taksirkanlah hasil penjumlahan pecahan berikut

a. 3 + 8 1/2
=3/1 + (8x2+1)/2
=2(3/1) + 17/2
=6/2 + 17/2
=23/2
=12 1/2

b. 1 1/3 + 5
=(1x3+1)/3 + 5/1
=4/3 + 5/1
=4/3 + 3(5/1)
=4/3 + 15/3
=19/3
=6 1/3