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\(328-\left[x-\left(33.32-29:22\right).2\right]=274\)
\(328-\left[x-\left(1056-\frac{29}{22}\right).2\right]=274\)
\(x-2112+\frac{29}{11}=328-274\)
\(x-2112+\frac{29}{11}=54\)
\(x=54+2112-\frac{29}{11}\)
\(x=\frac{23797}{11}\)
vậy \(x=\frac{23797}{11}\)
\(A=\frac{34}{7.13}+\frac{51}{13.22}+\frac{85}{22.37}+\frac{68}{37.49}\)
\(=\frac{17.2}{7.13}+\frac{17.3}{13.22}+\frac{17.5}{22.37}+\frac{17.4}{37.49}\)
\(=17\left(\frac{2}{7.13}+\frac{3}{13.22}+\frac{5}{22.37}+\frac{4}{37.49}\right)\)
\(=\frac{17}{3}\left(\frac{6}{7.13}+\frac{9}{13.22}+\frac{15}{22.37}+\frac{12}{37.49}\right)\)
\(=\frac{17}{3}\left(\frac{1}{7}-\frac{1}{13}+\frac{1}{13}-\frac{1}{22}+...+\frac{1}{37}-\frac{1}{49}\right)\)
\(=\frac{17}{3}\left(\frac{1}{7}-\frac{1}{49}\right)\)\(=\frac{17}{3}.\frac{6}{49}=\frac{17.2}{49}=\frac{34}{49}\)
Có : \(\frac{17}{24}=\frac{34}{48}\)
Vì 48 < 49 => \(\frac{34}{48}>\frac{34}{49}\). Hay \(\frac{17}{24}>A\)
a) 5 69 : 5 67 – 3 40 : 3 39 = 5 2 – 3 1 = 25 – 3 = 22
b) 155 – [ 2 . ( 30 + 5 – 26 ) . ( 24 : 3 )]
= 155 – [ 2 . 9 . 8 ] = 155 – 144 = 11
c) 37 . 143 + 37 . 57 + 1300
= (37 . 143 + 37.57) + 1300
= 37.(143+ 57) + 1300
= 37. 200 + 1300
= 7400 + 1300
8700.
tương tu bài tr bạn đăng
340-[175+(37+x)]:22=328
[175 +(37+x)]: 22 = 340 - 328
[175 +(37 +x)] : 22= 12
175 +(37 +x) = 12 *22
175 +(37 +x) =264
37 +x = 264 - 175
37 +x= 89
x= 89 -37
x= 53