Question

54.5×353+54.5×432+785×45.5的简便运算

Answer 1

  54.5×353+54.5×432+785×45.5

=54.5×（353+432） + 785×45.5   ............部分应用乘法的分配律

=54.5×785 + 785×45.5

=785×（54.5+45.5）............再用乘法的分配律

=785×100

=78500

Answer 2

=54.5 * (353 + 432) +785 * 45.5=(54.5 *785 ）+(45.5 * 785)=785 *(54.5+45.5)=785 * 100=78500