38.3x7.6+11x9.25+427x0.24的简便算法是什么啊?不算难,可就是怎么也找不到简便算法.我相信一定有高人来指点一二啊.

Question

38.3x7.6+11x9.25+427x0.24的简便算法是什么啊?
不算难,可就是怎么也找不到简便算法.我相信一定有高人来指点一二啊.

Answer 1

38.3x7.6+11x9.25+427x0.24
=38.3x7.6+11x9.25+42.7x2.4
=38.3x7.6+1.1x92.5+38.3x2.4+4.4×2.4
=38.3×（7.6+2.4）+1.1×92.5+1.1×9.6
=38.3×10+1.1×（92.5+9.6）
=383+1.1×102.1
=383+112.31
=495.31