5.28++3.72-
77.5×+2.5×12.5%
×2019
0.4+6.6= 1-7÷8= 2.4×5= 3.4+2.6÷10%=
10-3.6× = :0.1= ×8÷ ×8= 9×( )=
1+2%=
0.2:0.18 17:51 :
×(+)÷ 37×60%+×37+37 ÷[(+)×]
×=38.5
×=3.85
385÷=0.385
4,10,17,25,34,,55。