如题所述
第1个回答 2020-04-03
简便计算
99×15+ 99
=99x(15+1)
=(100-1)x16
=100x16-16
=1600-16
=1584
99×15+ 99
=99x(15+1)
=(100-1)x16
=100x16-16
=1600-16
=1584
第2个回答 2023-03-17
=99*(15+1)
=99*16
=(100-1)*16
=1600-16
=1584
=99*16
=(100-1)*16
=1600-16
=1584
第3个回答 2020-04-03
99×15+99
=99X(15+1)
=99X16
=(100-1)X16
=100X16-1X16
=1600-16
=1584
=99X(15+1)
=99X16
=(100-1)X16
=100X16-1X16
=1600-16
=1584