tolong kak bantu jawab buat sekarang pake cara

a) (32:2) + ( -12 × (-4))
= 16 + 48
= 64

b) 5 3/4 - 4 2/3 + 1/2
= 23/4 - 14/3 + 1/2
= 69/12 - 56/12 + 6/12
= 19/12
= 1 7/12