Question

数学递等式

8.7×3.5-2.2×3.5+6.5×6.5

能简便就简便 我出追加20

Answer 1

=(8.7-2.2+6.5)×6.5
=2×6.5×6.5
=13×(6+0.5)
=78+6.5
=84.5

Answer 2

？？这个需要简吗?
=3.5*（8.7-2.2）+6.5*6.5
=3.5*6.5+6.5*6.5
=6.5*（3.5+6.5）
=6.5*10
=65