(1)計(jì)算:3.45+1.65(2)計(jì)算:7.24-1.8分析本題是小數(shù)加減法計(jì)算。計(jì)算時(shí)要注意將小數(shù)點(diǎn)對(duì)齊,計(jì)算結(jié)果小數(shù)末尾有0的,要將0去掉。解答(1)3.45+1.65=5.1(2)7.24-1.8=5.44點(diǎn)撥整數(shù)、小數(shù)的加減法計(jì)算要注意以下幾點(diǎn):(1)相同的數(shù)位對(duì)齊;(2)相加滿幾十 (本文共 1271 字 , 3 張圖 ) [閱讀本文] >>