36*19+64*144如何简便
问题描述:
36*19+64*144如何简便
答
36*19+64*144
= 19*36+64*4*36
= 19*36+256*36
= (19+256)*36
= 275*2*2*9
= 550*2*9
= 1100*9
= 9900