5.24= 4.3= 20=
(65+13)×465×4+13×4
720÷36÷2720÷(36÷2)
1800-799= ×0= 354+147≈
10-10%= 3.6 +1.8= ×5.6= 723÷89≈
2÷= 12.3+7 = 0.23= 0.125×17×8=