(1)+2.4=6(2)3.5: =5:4.2(3)1.8=2.4(4)=(5)631.8=7.2(6)175=2.4+3 (7)= (8) =(9)12.62=8(10)=(11)=(12) +50%=42(13)413=31(14)4.5+8=27(15)2+4.33=14(16) (1)1(17)(18)342.5(19)(20)1.6:(21)3163102(22)x:1:(23)47.112.5(24):0.6:4(25)::(26) 0.329.1(27)(28)x(29) : :(30): :(31)3+2(32):0.3: (33)13189.2(34):0.2580: (35)47.112.5(36)(37)(38):12(39) =(40) :=12:3(41)2.40.452=0.3(42):=:0.1(43)6.35=4.1(44)1.25:5=0.75:(45):=:6(46)2.5=0.6(47) =(48): =:(49)=(50)+1.2=3.4(51)4:6=15:(52):=: