42×79+22×42-22简便计算
第1个回答 2017-06-10
42×79+22×42-22
=42×（79+22）-22
=42×100-22
=4200-22
=4178追答
=42×（79+22）-22
=42×100-22
=4200-22
=4178追答
42×79+22×42-22
=42×（79+22）-22
=42×101-22
=4200+42-22
=4220
第2个回答 2017-06-10
42×79+22×42-22
=42×（79+22）-22
=42×（100+1）-22
=42×100+42-22
=4200+（42-22）
=4200+20
=4220
=42×（79+22）-22
=42×（100+1）-22
=42×100+42-22
=4200+（42-22）
=4200+20
=4220
第3个回答 2017-06-10
=42x(79+22)-22
=42x101-22
=42x(100+1)-22
=42x100+42-22
=4200+20
=4220
=42x101-22
=42x(100+1)-22
=42x100+42-22
=4200+20
=4220
第4个回答 2017-06-10
=42×(79+22)-22
=42×101-22
=42×101-42+20
=42×(101-1)+20
=42×100+20
=4200+20
=4220本回答被网友采纳
=42×101-22
=42×101-42+20
=42×(101-1)+20
=42×100+20
=4200+20
=4220本回答被网友采纳
