Question

Efectuati calculele:
Va rog repede dau 100 de puncte​

Answer 1

Răspuns:

a. -2/7+5/7=3/7

b. -4/3-70/3= -74/3

c. 9/4+3/4=12/4=3

d. ²⁾1/3-1/6=2/6-1/6=1/6

e. ²⁾(-2/5)+7/10=-4/10+7/10=3/10

f. 5/12+²⁾1/6=5/12+2/12=7/12

g. -1/24-³⁾9/8= -1/24-27/24=(-28/24)⁽⁴= -7/6

h. 4,5-1,5=3

i. -7,7+2,8-9=-13,9

Answer 2

$\it a)\ \ =-\dfrac{2}{7}+\dfrac{5}{7}=\dfrac{-2+5}{7}=\dfrac{3}{7}\\ \\ \\ c)\ \ =\dfrac{9}{4}+\dfrac{3}{4}=\dfrac{9+3}{4}=\dfrac{12}{4}=3\\ \\ \\ d)\ \ =\dfrac{2}{6}-\dfrac{1}{6}=\dfrac{1}{6}\\ \\ \\ e)\ \ =-\dfrac{4}{10}+\dfrac{7}{10}=\dfrac{-4+7}{10}=\dfrac{3}{10}\\ \\ \\ g)\ \ =-\dfrac{1}{24}-\dfrac{27}{24}=\dfrac{-1-27}{24}=-\dfrac{\ \ 28^{(4}}{24}=-\dfrac{7}{6}\\ \\ \\ h)\ \ =4,5-4,5+3=3\\ \\ \\ i)=-7,7+2,8-9=2.8-16,7=-13,9$