Răspuns:
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Bună,
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[tex]a)4 \frac{4}{5} \times 1 \frac{7}{8} = \\ \frac{5 \times 4 + 4}{5} \times \frac{8 \times 1 + 7}{8} = \\ \frac{24}{5} \times \frac{15}{8} = \\ 3 \times 3 = \\ \blue{9} [/tex]
[tex]b)3 \frac{1}{5} \times 1\frac{3}{4} = \\ \frac{3 \times 5 + 1}{5} \times \frac{4 \times 1 + 3}{4} = \\ \frac{16}{5} \times \frac{7}{4} = \\ \frac{4}{5} \times 7 = \\ \green{ \frac{28}{5} }[/tex]
[tex]c)10 \frac{1}{2} \times 5 = \\ \frac{2 \times 10 + 1}{2} \times 5 = \\ \frac{21}{2} \times 5 = \\ \purple{ \frac{105}{2} } [/tex]
[tex]d)7 \times 3 \frac{1}{4} = \\ 7 \times \frac{4 \times 3 + 1}{4} = \\ 7 \times \frac{13}{4} = \\ \orange{ \frac{91}{4} } [/tex]
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Sper că te-am ajutat.
