\(37^2\)+2 . 37 . 13+\(13^2\)
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1, ( 37 . 13 - 13 . 1 ) : ( 24 + 37 . 12 )
[ 13 . ( 37 - 1 ) ] : ( 12 . 2 + 37 . 12 )
( 13 . 36 ) : [ 12 ( 2 + 37 ) ]
( 13 . 36 ) : ( 12 . 36 )
36
chắc z ^^
lm bừa ko cần mt
1 ) 1996.1037 - 1996.37
= 1996.( 1037 - 37 )
= 1996.1000
= 1996000
2 ) ( 260 - 13 ) : 13
= 247 : 13
= 19
3 ) ( 23.35 + 35.37 ) : 60
= 35.( 23 + 37 ) : 60
= 35.60 : 60
= 2100 : 60
= 35
Đáp số : 1 ) 1996000
2 ) 19
3 ) 35
a) Ta có: \(37^2+2\cdot37\cdot13+13^2\)
\(=\left(37+13\right)^2=50^2=2500\)
b) Ta có: \(201^2=\left(200+1\right)^2\)
\(=200^2+2\cdot200+1\)
\(=40000+200+1=40201\)
c) Ta có: \(37\cdot43=\left(40+3\right)\cdot\left(40-3\right)\)
\(=40^2-3^2=1600-9=1591\)
Ta có: \(B=\dfrac{11}{13}\cdot\dfrac{40}{13}+\dfrac{37}{5}:\dfrac{7}{33}-\left(\dfrac{11}{13}+\dfrac{33}{7}:\dfrac{5}{2}\right)\)
\(=\dfrac{440}{169}+\dfrac{37}{5}\cdot\dfrac{33}{7}-\dfrac{11}{13}-\dfrac{33}{7}\cdot\dfrac{2}{5}\)
\(=\dfrac{297}{169}+\dfrac{33}{7}\cdot\left(\dfrac{37}{5}-\dfrac{2}{5}\right)\)
\(=\dfrac{297}{169}+\dfrac{33}{7}\cdot7\)
\(=\dfrac{297}{169}+33=\dfrac{5874}{169}\)
\(37^2+2\times37+13^2.\)
\(=37\times37+2\times37+13^2\)
\(=37\times\left(37+2\right)+13^2\)
\(=37\times39+13^2\)
\(=37\times39+169\)
\(=1443+169=1612\)
Sửa đề : \(-\dfrac{19}{37}=\dfrac{19}{37}\)
\(\dfrac{19}{37}-\dfrac{31}{24}-\dfrac{19}{37}+1\dfrac{7}{24}-\dfrac{2}{13}\)
\(=\dfrac{19}{37}-\dfrac{31}{24}+\dfrac{19}{37}+\dfrac{31}{24}-\dfrac{2}{13}\)
\(=\left(\dfrac{19}{37}-\dfrac{19}{37}\right)+\left(-\dfrac{31}{24}+\dfrac{31}{24}\right)-\dfrac{2}{13}=-\dfrac{2}{13}\)
\(8697-\left[3^7:3^5+2\left(13-3\right)\right]=8697-\left(3^2+2.10\right)=8697-\left(9+20\right)=8697-29=8668\)
8697-\([\)(37:35+2(13-3)\(]\)=8697-\([\)32+2x10\(]\)=8697-29=8668
\(37^2+2.37.13+13^2\\ =\left(37+13\right)^2=50^2=2500\)