Quay lại đáp án

	2	bớt 1 ký tự trong đáp án
$a)BT=[(-2)(-50)].[(-8)(-125)].5=100.1000.5=500000$.$b)BT=2155-174-2155+174-88=(2155-2155)+(174-174)-88=0+0-88=-88$ $a)BT=[(-2)(-50)].[(-8)(-125)].5=100.1000.5=500000$.$b)BT=2155-174-2155+174-88=(2155-2155)+(174-174)-88=0+0-88=-88$) $a)BT=[(-2)(-50)].[(-8)(-125)].5=100.1000.5=500000$.$b)BT=2155-174-2155+174-88=(2155-2155)+(174-174)-88=0+0-88=-88$

	1	tạo mới
$a)BT=[(-2)(-50)].[(-8)(-125)].5=100.1000.5=500000$.$b)BT=2155-174-2155+174-88=(2155-2155)+(174-174)-88=0+0-88=-88$)

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