75*37+77*33怎么计算简便
问题描述:
75*37+77*33怎么计算简便
答
75*37+77*33
=75*37+(75+2)*33
=75*(37+33)+2*33
=75*70+66
=5250+66
=5316
答
(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
答
75*37+77*33
=75*37+75*33+2*33
=75*70+66
=5250+66
=5316