99×23加99×26加49用简便方法计算怎么算
第1个回答 2017-03-20
99×23+99×26+49
=99×(23+26)+49
=99×49+1×49
=(99+1)×49
=100×49
=4900本回答被网友采纳
=99×(23+26)+49
=99×49+1×49
=(99+1)×49
=100×49
=4900本回答被网友采纳
第2个回答 2017-03-20
99x23+99x26+49
=99x23+99x26+23+26
=23x(99+1)+26x(99+1)
=23x100+26x100
=(23+26)x100
=49x100
=4900
=99x23+99x26+23+26
=23x(99+1)+26x(99+1)
=23x100+26x100
=(23+26)x100
=49x100
=4900
