a) 47 – [(45.24 – 52.12):14]

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