递等式计算 8.7×3.5-2.2×3.5+6.5×6.5要过程
问题描述：
递等式计算 8.7×3.5-2.2×3.5+6.5×6.5
要过程
答
8.7×3.5-2.2×3.5+6.5×6.5 =3.5x(8.7-2.2+6.5)=3.5x13=
咳咳- -口算不太好。。用计算器吧最后答案
答
65
答
8.7×3.5-2.2×3.5+6.5×6.5
=(8.7-2.2)×3.5+6.5×6.5
=6.5×3.5+6.5×6.5
=6.5×(3.5+6.5)
=6.5×10
=65
答
8.7×3.5-2.2×3.5+6.5×6.5
=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
答
8.7×3.5-2.2×3.5+6.5×6.5
=(8.7-2.2)×3.5+6.5×6.5
=6.5×3.5+6.5×6.5
=6.5×(3.5+6.5)
=6.5×10
=65