26*19+13*19+39*81的简便计算怎样做

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/25 03:43:24
26*19+13*19+39*81的简便计算怎样做26*19+13*19+39*81的简便计算怎样做26*19+13*19+39*81的简便计算怎样做26*19+13*19+39*81=(26+13)

26*19+13*19+39*81的简便计算怎样做
26*19+13*19+39*81的简便计算怎样做

26*19+13*19+39*81的简便计算怎样做
26*19+13*19+39*81
=(26+13)*19+39*81
=39*19+39*81
=39*(19+81)
=39*100
=3900

(26+13)*(19+81)=3900

26*19+13*19+39*81
=(26+13)*19+39*81
=39*19+39*81
=39*(19+81)
=39*100
=3900

26*19+13*19+39*81=(26+13)*19+39*81=39*19+39*81=39*(19+81)=3900

原式=(26+13)*19+39*81
=39*(19+81)
=39*100=3900

26*19+13*19+39*81
=(26+13)*19+39*81
=39*19+39*81
=39*(19+81)
=39*100
=3900