34×19+34×22-34=34×(19+22-1)=34×40=1360
34x19十34x22一34=34x(19+22-1)=34x40=1360
=34×(19+22-1)=34×40=1360望采纳
=34X(19+22-1)=34X40=1360
34x19+34x22-34=34x19+34x22-34x1=34x19+34x(22-1)=34x19+34x21=34x(19+21)=34x40=1360