a×8+b×5
=8a+5b(千克)
答:8袋面粉和5袋大米共重8a+5b千克.
故答案为:8a+5b.
每袋面粉重a千克,每袋大米重b千克,8袋面粉和5袋大米共重_千克.
每袋面粉重a千克,每袋大米重b千克,8袋面粉和5袋大米共重______千克.
数学人气:727 ℃时间:2019-10-19 14:50:40
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