645+80-(245+120)简便计算
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答案360、简便计算 645+80-(245+120) =645+80-245-120 =(645-245)+80-120 =400+80-120 =480-120=360
咨询记录 · 回答于2022-12-04
645+80-(245+120)简便计算
答案360、简便计算 645+80-(245+120) =645+80-245-120 =(645-245)+80-120 =400+80-120 =480-120=360
答案360、简便计算 645+80-(245+120) =645+80-245-120 =(645-245)+80-120 =400+80-120 =480-120 =360
同学,能明白吧