49×99+99怎样简便运算

Question

如题所述

Answer 1

Answer 2

49×99+99
=（49+1）×99
=50×99
=50×(100-1)
=5000-50
=4950

Answer 3

=99×（49+1）=99×50=（100-1）×50=5000-50=4950

Answer 4

49×99+99
=(49+1)×99
=50×99
=50×(100-1)
=50×100-50×1
=5000-50
=4950

Answer 5

49×99+99
=99x(49+1)
=99x50
=4950本回答被提问者采纳