75*37+77*33怎么计算简便

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75*37+77*33怎么计算简便
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75*37+77*33怎么计算简便
75*37+77*33怎么计算简便

75*37+77*33怎么计算简便
75*37+77*33
=75*37+75*33+2*33
=75*70+66
=5250+66
=5316

(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

75*37+77*33
=75*37+(75+2)*33
=75*(37+33)+2*33
=75*70+66
=5250+66
=5316