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\(=\frac{373737}{474747}+\frac{5757}{4747}\)
\(=\frac{37}{47}+\frac{57}{47}\)
\(=\frac{94}{47}\)
\(\frac{373737}{474747}+\frac{5757}{4747}\)
\(=\frac{373737\div10101}{474747\div10101}+\frac{5757\div101}{4747\div101}\)
\(=\frac{37}{47}+\frac{57}{47}\)
\(=\frac{94}{47}\)\(=2\)
Học tốt~
37*10101 / 47*10101 + 57*101 / 47*101
= 37 / 47 + 57 /47
= ( 37 + 57 ) / 47 = 2
Trả lời :
373737 / 474747 + 5757 / 4747
= 37 / 47 + 57 / 47
= 94 / 47
373737/474747=37x10101/47x10101=37/47
123123/246246=123x1001/246x1001=123/246=1/2
vì 37/47> 1/2 nên 373737/474747> 123123/246246
\(5-\dfrac{x}{9}=\dfrac{4}{36}\)
\(\dfrac{x}{9}=5-\dfrac{4}{36}\)
\(\dfrac{x}{9}=\dfrac{44}{9}\)
\(\Rightarrow x=44\)
\(\dfrac{5-x}{9}=\dfrac{4}{36}=\dfrac{1}{9}\)
⇒ 5 - x = 1 ⇒ x = 4
Vậy x = 4
\(\frac{2}{5}-\frac{1}{7}+\frac{3}{5}.\frac{1}{3}=\frac{14}{35}-\frac{5}{35}+\frac{7}{35}=\frac{16}{35}\)
\(\frac{2}{5}-\frac{1}{7}+\frac{3}{5}\times\frac{1}{3}\)
\(=\frac{2}{5}-\frac{1}{7}+\frac{1}{5}\)
\(=\frac{9}{35}+\frac{1}{5}\)
\(=\frac{16}{35}\)
373737 / 474747+ 5757 / 4747
=37/47 + 57/47
= 94/47