82x46+11x46+7x46=46x(82+11+7)=46x100=4600
82×46=377211×46=5067×46=32282×46+11×46+7×46=46×(82+11+7)=46×100=460082×46-11×46-7×46=46×(82-11-7)=46×64=2944