Р102×0.45= 8.27+7.52+1.73-3.52= Р0.79×99+0.79= 2.8×3.2+3.2×7.2=Р0.15+ 0.75×18= 72+8÷2.5-30.2= 10.5×1.03=Р РР保留一位小数:Р8.85÷13≈ 0.72÷0.7≈ 3.18÷2.8≈Р2.17×6≈ 0.24×15≈ 0.76×34≈ 1.05×16≈Р50×0.13×0.2≈ 1.25×0.7×0.8≈ 0.3×2.5×0.4≈Р0.78×100.5≈ 1.5×102≈ 1.2×2.5+0.8×2.5≈Р保留一位小数:Р14.36÷2.7≈ 8.33÷6.2≈ 1.7÷0.03≈Р27×0.43≈ 0.86×1.2≈ 1.2×1.4≈Р保留两位小数:Р3.81÷7≈ 246.4÷13≈ 7.09÷0.52≈Р0.17×0.8≈Р保留两位小数:Р2.7×0.35≈ 32÷42≈ 1.25÷1.2≈ 2.41÷0.7≈Р除不尽的用循环小数表示Р162÷3.6= 13÷11= 4.6÷0.27=Р用简便方法计算:Р12.5×4.8= 1.01×2.6= 3.8×9.9=Р用简便方法计算:Р0.125 ×2.5×3.2= 0.93×201= 871×47+871×53=Р(7.04+2.76)×1.2= 4.25×0.99+0.01= 125×32= Р7.06×2.4-5.7= 2.33×0.5×4= 0.65×105=Р3.76×0.25+25.8= Р用简便方法计算:Р4.8×0.25= 1.2×2.5+0.8×2.5= 1.3944÷0.84= Р28.3×0.1×2.7= 58.36×0.5+18.2= 1.01×8.5= Р Р0.79×98+0.79 ×2= 0.48×1.25= 0.25×5.8×0.4=Р0.225÷1.5×(4-3.68)
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