а) 999-193-424:4= 999-193-106= 700
б)423-31*9= 423-279= 144
в) 160-80= 80
г) 470+170= 640
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а) 999-193-424:4= 999-193-106= 700
б)423-31*9= 423-279= 144
в) 160-80= 80
г) 470+170= 640
б) 423-31×9=144
г) 470+170=640
в) 160-80=80