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第1个回答 2020-09-16
算式49×49+49×(40+6)×25的简便计算,详细的操作如下:
49×49+49×(40+6)×25
=(50-1)²+(50-1)×(40+6)×25
=2498+(50×40)+(1×6)×25
=2498+2006×25
=4498+50150
=54648
49×49+49×(40+6)×25
=(50-1)²+(50-1)×(40+6)×25
=2498+(50×40)+(1×6)×25
=2498+2006×25
=4498+50150
=54648
第2个回答 2020-09-16
49×49+49×(40+6)×25
=49×49+49×40×25+49×6×25
=49×49+49000+49×150
=49000+49×(49+150)
=49000+49×(200-1)
=49000+9800-49
=58800-(50-1)
=58751
=49×49+49×40×25+49×6×25
=49×49+49000+49×150
=49000+49×(49+150)
=49000+49×(200-1)
=49000+9800-49
=58800-(50-1)
=58751