14.8×6.3-6.3×6.5+8.3×3.7 =(14.8-6.5)×6.3+8.3×3.7="8.3×6.3+8.3×3.7" 8.3×(6.3+3.7) =8.3×10=83( )
两个小数相乘的积保留两位小数后是5.18,积的准确值可能是5.176..(判断对错)
妈妈今天买菜花了6.5655元..(判断对错)
9.0347精确到十分位是9.(判断对错)
5.895保留两位小数约是5.90..(判断对错)
判一判. (1)5.095精确到0.01是5.10. (2)求商的近似值一般用“四舍五入法”..