1÷= ×= += -=
642÷6= 0.9×99+0.9= 1.25×80= 2.5÷0.01=
÷ = 2﹣ ﹣ = 3﹣ ﹣ = ( ÷ )×30=
1.85﹣+= 1÷×= +0.375=
2.4﹣= (+)×2.4= 5÷×5÷=
10×45%= 1.25×8= 40×(1﹣20%)=
27+68= 341﹣103= 270÷18= -=
2÷= 0.42×0.2= 3.5×50= ×=
+=
16÷20%= 4.8÷(0.4+1.2)=
-(-)= 12÷0.25÷4=
151-24= 5.6÷0.07= ×75%= ×2÷×2=
= 2.5×0.24= 1.76-(0.76+)=