Question

Efectuati a)2/2+3/2= b)3/4-2/4= c)5/3+5/2= d) 4+15/1+25/2= e)100/0+45/0= f)13/2+1/100= g)15/2-14/2= h)2/2+2/3+2/4= i)4/3-3/3+5= j)6/3-5/3-4/3= k)3/2+4/2-5/2 l)2011/0+2011/1=​

Answer 1

Explicație pas cu pas:

a)

$\frac{2}{2} + \frac{3}{2} = \frac{5}{2}$

b)

$\frac{3}{4} - \frac{2}{4} = \frac{1}{4}$

c)

$\frac{5}{3} + \frac{5}{2} = \frac{5 \times 2 + 5 \times 3}{6} = \frac{25}{6}$

d)

$4 + \frac{15}{1} + \frac{25}{2 } = \frac{4 \times 2 + 2 \times 15 + 25}{2} = \frac{8 + 30 + 25}{2} = \frac{63}{2}$

cred ca asa este scris

e)

$\frac{100}{0} + \frac{45}{0} = 0$

f)

$\frac{13}{2} + \frac{1}{100} = \frac{13 \times 50 + 1}{100} = \frac{650}{100} = \frac{65}{10}$

g)

$\frac{15}{2} - \frac{14}{2} = \frac{1}{2}$

h)

$\frac{2}{2} + \frac{2}{3} + \frac{2}{4} = \frac{2 \times 6 + 2 \times 4 + 2 \times 3}{12} = \frac{12 + 8 + 6}{12} = \frac{26}{12} = 3$

i)

$\frac{4 - 3}{3} + \frac{5 \times 3}{3} = \frac{1 + 15}{3} = \frac{16}{3}$

j)

$\frac{6 - 5 - 4}{3} = \frac{ - 3}{3} = - 1$

k)

$\frac{3 + 4 - 5}{2} = \frac{7 - 5}{2} = \frac{2}{2} = 1$

l)

$0 + 2011 = 2011$