Question

75*37+77*33怎么计算简便

Answer 1

75×37+77×33
=75×37+（75+2）×33
=75×37+75×33+2×33
=75×（37+33）+66
=75×70+66
=5316

Answer 2

（77-2）*（33+4）+77*33

=77*33+77*4-2*33-2*4+77*33

=2*77*33+2（77*2-33-4）

=77*66+2*107

=11*11*7*6+2*107

=2（121*7*3+107）

=2*（121*21+107）

=2*2648

=5296