0.03+0.52= 3-0.3= 2.5×0.4= 0.4×0.7=
(25+8)×8 25×65+75×65 99×87 31×134-31×34
0.05+6.5= 0÷185= 2×12×5= ( )×100=4
6.9-3= 330÷2÷5= 50-50÷5= ( )÷10=6.18
3.2÷0.01= 5.6+3.99= ÷ =
× = 4.1+1÷2=