1.79+8.11= 21.5+9.5= 2.5×0.4= 2-0.01=
0.48÷0.05= 0.47÷0.001= 12.5×1.6= 0.032=
+=
-=
2.4–=
1-=
1--=
++=
68+32= 10-0.6= 1.25×80= 0.8÷0.04=
2.4÷ = × = 5×8%= ÷ =