420:70= 60:=20= 76:4= 450:50=
370:10= 640:80= 15x5= 23x3=
12x10= 480:80= 48 -28+6= ”72:12x0=
70- 34= 100-54= 50+50x7= ”6x(31-15)=
30 - 19= 14x2= 190- 30x5= ”90 - 40x2=
696:3= 125x8= 8x25= 80:20=
72 - 45= 4x50= 20x2= 300x60=
120x3 = 420x20 = 16x70= 150x20=
60:-30= 80:20= 240:40 =