《数学儿童乐园》PPT课件.ppt
儿 童 乐 园,1个3,1个2,用加法算:,336,用乘法算:,326,2226,236,2个3,2个2,3个2,1个4,1个3,用加法算:,44412,用乘法算:,4312,333312,3412,2个4,3个4,2个3,3个3,4个3,用加法算:,555520,用乘法算:,5412,4444420,4512,1个5,2个5,3个5,4个5,1个4,2个4,3个4,4个4,5个4,求几个相同加数的和用乘法计算比较简便,5420,乘数,乘号,乘数,积,读作:5乘4等于20,;http:/;块鬻阬,谢谢再见,