五上数学小数计算专项小纸条(Day01) 一、小数乘除法 0.075÷0.15=0.5 70.5÷0.94=75 0.79×3.04=2.4016 0.728÷3.2=0.2275 3.72×1.8=6.696 4.38×0.19=0.8322 二、小数四则运算 45.7×20.1-4.57 =45.7×20.1-45.7×0.1 =45.7×(20.1-0.1) =45.7×20 =914 2.5×1.6×1.25 =2.5×0.2×8×1.25 =(2.5×0.2)×(8×1.25) =0.5×10 =5 (9.6+3.2)÷0.8 =12.8÷0.8 =16 2.5×1.6×1.25 =2.5×0.2×8×1.25 =(2.5×0.2)×(8×1.25) =0.5×10 =5 三、解方程 0.7(x-2)=0.35 解:x-2=0.35÷0.7 x-2=0.5 x=0.5+2 x=2.5 5.6÷x=40 解:x=5.6÷40 x=0.14 0.1x+0.6=3.3×0.4 解:0.1x+0.6=1.32 0.1x=1.32-0.6 0.1x=0.72 x=7.2 3.6x+2.2x=63.8 解:5.8x=63.8 x=11
