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ababab : ( ab * 3 )
= ababab : ab : 3
= ab * 10101 : ab : 3
= ( ab : ab ) * ( 10101 : 3 )
= 1 * 3367 = 3367
Vậy ababab : ( ab * 3 ) = 3367
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A = ababab : ( 39 x ab ) +1758
A = ab x 10101 : 39 : ab + 1758
A = ( ab : ab ) x ( 10101 : 39 ) + 1758
A = 1 x 259 + 1758
A = 2017
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19 17 + 13 51 = 57 51 + 13 51 = 70 51
26 30 - 7 15 = 26 30 - 14 30 = 12 30 = 2 5
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a)\(\frac{2525}{2727}\)không rút gọn được. b)\(\frac{7}{20}\) = \(\frac{42}{120}\);\(\frac{23}{30}\) = \(\frac{92}{120}\);\(\frac{34}{40}\) = \(\frac{102}{120}\);\(\frac{53}{60}\) = \(\frac{106}{120}\)
\(\frac{135135}{500500}\)= \(\frac{57027}{100100}\)
\(\frac{135153153}{170170170}\)=\(\frac{45051051}{56723390}\)
ababab : ( ab x 3 ) - 1351
= ( 1351 x 3 ) - ( ababab : ab )
= 4053 - 111
= 3942