12.5×4.5+4.5×12.5+12.5的简便算法?
问题描述:
12.5×4.5+4.5×12.5+12.5的简便算法?
答
=(4.5+4.5+1)*12.5
=10*12.5
=125
答
=12.5x4.5+4.5x12.5+12.5x1
=12.5x(4.5+4.5+1)
=12.5x10
=125
答
12.5×4.5+4.5×12.5+12.5
=12.5×(4.5+4.5+1)
=12.54×10
=125
答
把12.5提出来