Tolong jawab no 3-5 please bantu saya!

3. (15 X 6) + (10:-5)
=90+(-2)
=88
4. 3¼-1,5+2¾
=13/4 - 1,5 + 11/4
=3,25-1,5+2,75
= 1,75+2,75
=4,5
5. (4,5 X 40%):¼
=(4,5 X 0,4):0,25
=1,8:0,25
=7,2