Question

要简便计算哦

Answer 1

6.5*98
=6.5*(100-2)
=6.5*100-6.5*2
=650-13
=637

追答

求采纳

呵呵

Answer 2

=6.5x(100一2)
=6.5x100-6.5x2
=650-13
=637

Answer 3

6·5x（100一2）
＝650x一13
＝8350

Answer 4

6.5×(100－2)＝6.5×100－6.5*2=650-13=637

Answer 5