50×60=
2.5-1.8=
20×34=
840÷4=
273-85-15=
0.8+2.4=
16×30=
435÷8=
7.3+14.2=
13×28=
13.6﹣7.9=
+ = 50÷50%= = 3 -1.125=
1.9÷2.5÷0.4= ( )×18= = 1- =