Question

Am nevoie de mare ajutor,pana si un singur exercitiu daca il puteti face va rog sa imi răspundeți,nu conteaza daca nu le puteti rezolva pe toate!!!​​

Answer 1

Răspuns:

1.

1/2 , 2/1 , 7/3 , 23/11 , 5/11 , 15/11 , 4/5.

2.

a)

1:3= 0,(3)= 3/9

1÷1/3 = 1÷3/9 = 1× 9/3 =3

1÷4/8 = 1×8/4 =2

b)

3÷1 = 3/1=3

1/3÷1 = 1/3= 0,(3) = 3/9

4/8÷1 =4/8= 2/4= 1/2 =0,5

inversele*mai putin la ultima ecuatie*

3.

a)

$\frac{a}{b} \div \frac{c}{d} = \frac{1}{3} \div \frac{5}{3} = \frac{1}{3} \times \frac{3}{5} = \frac{1}{5}$

b)

$\frac{a}{b} \div \frac{c}{d} =2 \frac{1}{3} \div 1 \frac{1}{2} = \frac{7}{3} \times \frac{1}{2} = \frac{7}{6}$

4.

a)

$\frac{1}{\frac{11}{2} } = 1 \div \frac{11}{2} = 1 \times \frac{2}{11} = \frac{2}{11}$

b)

$\frac{ \frac{1}{11} }{2} = \frac{1}{11} \div 2 = \frac{1}{11} \times \frac{1}{2 } = \frac{1}{22}$

c)

$\frac{ \frac{1}{7} }{ \frac{3}{4} } = \frac{1}{7} \div \frac{3}{4} = \frac{1}{7} \times \frac{4}{3} = \frac{4}{21}$

d)

$\frac{3 \frac{1}{7} }{ \frac{11}{21} } = \frac{ \frac{22}{7} }{ \frac{11}{21} } = \frac{22}{7} \div \frac{11}{21} = \frac{22}{7} \times \frac{21}{11} = 2 \times 3 = 6$

Sper ca te-am ajutat :)