Question

sa se efectueze
a)
$\frac{1}{8} + \frac{2}{5 } - \frac{1}{7}$
b)0,(7)-0,02​

Answer 1

Răspuns:

Explicație pas cu pas:

1/8 + 2/5 - 1/7 = 35/280 + 112-280 - 40/280 = 107/280

_______

0,(7) = 7/9

7/9 - 2/100 = 700/900 - 18/900 = 682/900 = 0,75(7)

Answer 2

a) 1/8+2/5-1/7=35/280+56/280-40/280=51/280

b) 0,(7)=7/9

0,02=2/100=1/50

7/9-1/50=350/450-9/450=

=341/450

Succes!