0.03+0.52= 3-0.3= 2.5×0.4= 0.4×0.7=
80-7.9= 3.2+0.91= 0.3×0.6= 25.3+10=
2.5×0.4= 6.34+0.45= 3.1×0.03= 5.8-4=