Question

Compară,fără a efectua calculele.Scrie semnul <,> sau=.​

Answer 1

Salutare!

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Totusi, trebuie sa calculam pentru a vedea diferenta si pentru a scrie raspunsul corect.

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$\frac{4}{9} + \frac{7}{9} = \frac{4 + 7}{11} = \frac{11}{11} \\ \\ \frac{7}{9} + \frac{4}{9} = \frac{7 + 4}{11} = \frac{11}{11} \\ \\ \frac{4}{9} + \frac{7}{9} = \frac{7}{9} + \frac{4}{9}$

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$\frac{5}{100} + \frac{20}{100} = \frac{5 + 20}{100} = \frac{25}{100} \\ \\ \frac{1}{100} + \frac{20}{100} = \frac{1 + 20}{100} = \frac{21}{100} \\ \\ \frac{5}{100} + \frac{20}{100} > \frac{1}{100} + \frac{20}{100}$

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$\frac{100}{100} - \frac{25}{100} = \frac{100 - 25}{100} = \frac{75}{100} \\ \\ \frac{100}{100} + \frac{50}{100} = \frac{100 + 50}{100} = \frac{150}{?100} \\ \\ \frac{100}{100} - \frac{25}{100} \: \: < \frac{100 }{100} + \frac{50}{100}$

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Observatii:

1. = - semnul pentru numerele egale
2. > - semnul mai mare
3. < - semnul mai mic

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Answer 2

$\it \dfrac{11}{9}=\dfrac{11}{9}\\ \\ \\ \dfrac{25}{100}> \dfrac{21}{100}\\ \\ \\ \dfrac{75}{100}< \dfrac{150}{100}$