Question

347×69+653×31+306×19用简便计算怎么做

Answer 1

347×69+653×31+306×19，
=347×（50+19）+653×（50-19）+306×19，
=347×50+347×19+653×50-653×19+306×19，
=（347+653）×50+（347+306-653）×19，
=1000×50+0×19，
=50000．
故答案为：50000．

Answer 2

347×69+653×31+306×19
=347×(31+38)+653×31+306×19
=347×31+347×38+653×31+306×19
=(347+653)×31+(347×2)×19+306×19
=1000×31+694×19+306×19
=31000+(694+306)×19
=31000+1000×19
=31000+19000
=50000

Answer 3

347×69+653×31+306×19
=347×(31+38)+653×31+306×19
=347×31+347×38+653×31+306×19
=(347+653)×31(347×2)×19+306×19=1000×31+694×19+306×19=31000(694+306)×19=31000+1000×19=31000+19000=50000

Answer 4

347×69+653×31+306×19
=347X31+694X19+653X31+306X19
=(347+653)X31+(694+306)X19
=1000X31+1000X19
=1000X(31+19)
=1000X50
=50000