Question

99×99+99用简便方法计算

Answer 1

99×99+99
= 99×(99+1)
= 99×100
= 9900

Answer 2

99×99+99
=99×（99+1）
=99×100
=9900

Answer 3

=99x（99+1）
=99x100
=9900

Answer 4

99✘(99+1)=9900

Answer 5

99×(99+1)