递等式计算 8.7×3.5-2.2×3.5+6.5×6.5要过程_数学解答

递等式计算 8.7×3.5-2.2×3.5+6.5×6.5
要过程

人气：424 ℃　时间：2019-12-29 15:09:51

解答

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