123456可以按此顺序写成哪些算式? 难了答:1+23456=23457,1*23456=23456,12+3456=3468,12*3456=41472123+456=579,123*456=56088,1234+56=1290,1234-56=11781234*56=69104,12345+6=12351,12345-6=12339,12345*6=740701+2+3456=3459,1+2*3456=6913,(1+2)*3456=10368,1-2+3456=34551*2+3456=3458,1*(2+3456)=3458,1*2*3456=6912,1...