5×400=
560÷70=
35×2=
26-180÷60=
660+250=
600÷20=
320÷20=
25×4÷25×4
510÷30= 1÷2.5=
= 1.2-0.03= 3× - ×3=
5+0.5÷0.5-5=
48×( )=