【五年级上册数学】 小数的四则运算•脱式计算

【五年级上册数学】 小数的四则运算•脱式计算


简介:
★脱式计算。(能简算的要简算) 3.06×0.9+9.1×3.06 =3.06×(0.9+9.1) =3.06×10 =30.6 30×[7.5÷(2.7-1.2)] =30×(7.5÷1.5) =30×5 =150 (2.8+3.2×4)÷1.5 =(2.8+12.8)÷1.5 =15.6÷1.5 =10.4 5.6×(12.5﹣8.5÷0.85) =5.6×(12.5﹣10) =5.6×2.5 =1.4×(4×2.5) =1.4×10 =14 98.5-125÷25×13 =98.5-5×13 =98.5-65 =33.5 1.4+12.6÷0.28×0.2 =1.4+45×0.2 =1.2+9 =10.2