2 câu trả lời
a)47-[(45.24–
= 47 - [12.(45.2-52) : 14]
=47 - [12.38 : 14]
= 47 - 456:14
=47 - 228/7
= 329/7 - 228/7
=101/7
Answer
47 - [(45 . 24 - 52 . 12) : 14]
= 47 - [(45 . 2 . 12 - 52 . 12) : 14]
= 47 - [(90 . 12 - 52 . 12) : 14]
= 47 - [12 . (90 - 52) : 14]
= 47 - [12 . 38 : 14]
= 47 - [456 : 14]
= 47 - 228/7
= 101/7