Question

Imi spuneti daca e corect la 3 si ma ajutati la 4 p.s daca vreti
Multumesc

Answer 1

Răspuns

3) $6*\frac{13}{15} +3*\frac{7}{12} - 4*\frac{9}{20} =\frac{90+13}{15} +\frac{36+7}{12} -\frac{80+9}{20} =\frac{103}{15} +\frac{43}{12} -\frac{89}{20}$

aducem la acelasi numitor comun

$\frac{412+215+267}{60} =\frac{894}{60} =\frac{447}{30} =\frac{149}{10} =14*\frac{9}{10}$

4)$4*\frac{9}{20} -1*\frac{5}{12} -1*\frac{11}{24} =\frac{80+9}{20} -\frac{12+5}{12} -\frac{24+11}{24} =\frac{89}{20} -\frac{17}{12} -\frac{35}{24}$

aducem șa acelasi numitor comun

$\frac{534-170-175}{120} =\frac{189}{120} =\frac{63}{40} =1\frac{23}{40}$

Explicație pas cu pas: