198-67+33198-(67+33) 720÷36÷2720÷(36÷2)
(730-230)÷10+42
40×[816÷(19+49)]
65.07-(15.3-4.8)
4321+500= 13.2-5.2= × = 0.2×1.4=
8÷25%= + = 2.4÷ = ÷ =