45*37+64*45-45怎么简便计算?

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45*37+64*45-45怎么简便计算?45*37+64*45-45怎么简便计算?45*37+64*45-45怎么简便计算?45*37+64*45-45=(45*37)+(64*45)-(45*1)

45*37+64*45-45怎么简便计算?
45*37+64*45-45怎么简便计算?

45*37+64*45-45怎么简便计算?
45*37+64*45-45
=(45*37)+(64*45)-(45*1)
=45*(37+64-1)
=45*100
=4500

45*37+64*45-45
=45*37+64*45-45*1
=45*(37+64-1)
=45*100
=4500

45*37+64*45-45
=45*(37+64-1)
=45*100
=4500