Răspuns:
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Bună,
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[tex]a) \: 3 \frac{1}{5} \times 1 \frac{3}{4} = \\ \frac{5 \times 3 + 1}{5} \times \frac{4 \times 1 + 3}{4} = \\ \frac{16}{5} \times \frac{7}{4} = \\ \frac{4}{5} \times 7 = \\ \purple{ \frac{28}{5} } [/tex]
[tex]b)7 \times 3 \frac{1}{4} = \\ 7 \times \frac{4 \times 3 + 1}{4} = \\ 7 \times \frac{13}{4 } = \\ \green{ \frac{91}{4} } [/tex]
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Sper că te-am ajutat.
