49+20= 600﹣340= 1.7+0.2= 1﹣0.3=
+= -= 0.9×0.4= 1.6÷4=
×= ÷= 1.7÷1%= ×1.2=
76×20= 514﹣300= 3.4+6= 9÷9%= 24×=
÷= 62= 8.7+= ﹣0.8= ﹣×0=
642÷6= 0.9×99+0.9= 1.25×80= 2.5÷0.01=
÷ = 2﹣ ﹣ = 3﹣ ﹣ = ( ÷ )×30=
187﹣28= 42.7+3= 0.622=
515÷5= 12.5%×8= =
9.7+4.2= 1.04﹣0.47= 0.25×0.8= 630+2.1=
+ = = = =
0.57+4.3=
×=
73×101=
-=
2.4÷0.1=
2.6×-×0.6=