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efectuati;a)7pe11imultit 3pe4 b)5pe18inmultit 7pe10 c)3pe20inmultit 5pe6 

Răspuns :

CarMina03
[tex] \frac{7}{11} [/tex]×[tex] \frac{3}{4} [/tex]=[tex] \frac{21}{44} [/tex]

[tex] \frac{5}{18} [/tex]×[tex] \frac{7}{10} [/tex]=[tex] \frac{7}{36} [/tex]

[tex] \frac{3}{20} [/tex]×[tex] \frac{5}{6} [/tex]=[tex] \frac{1}{8} [/tex]
1)[tex] \frac{ ^{4} 7}{11} .\frac{ ^{11} 3 }{4} = \frac{28*33}{44} = \frac{28*3}{4} = \frac{84 ^{4} }{4} = \frac{21}{1} =21[/tex]
2)[tex] \frac{5}{18} * \frac{7}{10} = \frac{5*126}{18} = \frac{630}{18} =35[/tex]
3)[tex] \frac{3}{20} * \frac{5}{6} = \frac{9*5}{6} = \frac{45}{6}=7 \frac{5}{6} [/tex]
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