Đinh Phương Thảo
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2026-01-13 21:02:03
a) 53.25-25.12+75.35
=(53.25+75.53)-25.12
=53.(25+75)-25 .12
=53.100-300
=5300-300
=5000
b)260:[5+7.(72:2³-6)]-3²
=260:[5+7.(72:8-6)]-9
=260:[5+7.(9-6)]-9
=260:[5+7.3]-9
=260:[5+21]-9
=260:26-9
=10-9
=1
2026-01-13 21:01:48
a) 53.25-25.12+75.35
=(53.25+75.53)-25.12
=53.(25+75)-25 .12
=53.100-300
=5300-300
=5000
b)260:[5+7.(72:2³-6)]-3²
=260:[5+7.(72:8-6)]-9
=260:[5+7.(9-6)]-9
=260:[5+7.3]-9
=260:[5+21]-9
=260:26-9
=10-9
=1
2026-01-13 21:01:40
a) 53.25-25.12+75.35
=(53.25+75.53)-25.12
=53.(25+75)-25 .12
=53.100-300
=5300-300
=5000
b)260:[5+7.(72:2³-6)]-3²
=260:[5+7.(72:8-6)]-9
=260:[5+7.(9-6)]-9
=260:[5+7.3]-9
=260:[5+21]-9
=260:26-9
=10-9
=1