Question

precizati daca fractia x pe y este echiunitara , supraunitara sau subunitara in cazurile.
b)x=2supra 60,y=8supra 20.
c)x=2supra 6 ,y=2supra5+2supra6
d)x=3supra35,y=5supra21
e)x=81supra27,y=27supra81 VA ROG SA MA AJUTATI ...PLZ

Answer 1

b. sub,sub(numitorii mai mari decat numaratorii)
c. x=subunitara, y=2(6+5)/30=11/15<1, deci subunitara
d. sub, sub
e. x=supra(numaratorul mai mare decat numitorul), y=subunitara

Pentru x/y facem calculele:

b. x/y = 2/60 *20/8 = 1/3 * 1/4 = 1/12, subunitara
c. 1/3 *15/11 = 5/11, sub
d. 3/35 * 21/5 = 3/5 * 3/5 = 9/25, sub
e. 81/27 * 81/27 = 3*3 = 9, supraunitara

Answer 2

$b)x = \frac{2}{60} = \frac{1}{30}$

$y = \frac{8}{20} = \frac{2}{5}$

$\frac{x}{y} = \frac{1}{30} \div \frac{2}{5} = \frac{1}{30} \times \frac{5}{2} = \frac{1}{12} = > subunitara$

$c)x = \frac{2}{6} = \frac{1}{3}$

$y = \frac{2}{5} + \frac{2}{6} = \frac{12}{30} + \frac{10}{30} = \frac{22}{30} = \frac{11}{15}$

$\frac{x}{y} = \frac{1}{3} \div \frac{11}{15} = \frac{1}{3} \times \frac{15}{11} = \frac{5}{11} = > subunitara$

$d)x = \frac{3}{35}$

$y = \frac{5}{21}$

$\frac{x}{y} = \frac{3}{35} \div \frac{5}{21} = \frac{3}{35} \times \frac{21}{5} = \frac{63}{175} = \frac{9}{25} = > subunitara$

$e)x = \frac{81}{27} = \frac{9}{3} = 3$

$y = \frac{27}{81} = \frac{3}{9} = \frac{1}{3}$

$\frac{x}{y} = 3 \div \frac{1}{3} = 3 \times 3 = 9=>supraunitara$