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Hoàng Vũ Gia Khang
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2023-08-23 20:33:59
a)=(53.25-75.53)-25.12
= 53.(25+75)-25.12
=53.100-25.12
=5300-300
=5000
b) = 260:[5+7.(72:8-6)]:9
= 260:[5+7.3]:9
= 260:26:9
= 10-9
= 1