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Calculati:
Urgent! :)
a) 0,2×[tex] \frac{5}{7} [/tex] + [tex] \frac{11}{14} [/tex]
b) [tex] 1\frac{2}{3} [/tex] × [tex] 2\frac{2}{5} [/tex] - [tex] 1\frac{1}{3} [/tex]
c) [tex]( \frac{2}{3} )^{2} [/tex] : [tex]1\frac{1}{2} [/tex]
d) 0,(6) : 0,6 - [tex] \frac{2}{3} [/tex]


Răspuns :

a) 0,2× 5/7+11/14= 2/10× 5/7+11/14=1/7+11/14=(2+11)/14=13/14
b) 1 2/3 ×2 2/5-1 1/3=5/3×12/5 - 4/3 =4-4/3=(12-4)/3=8/3
c) (2/3)²:1 1/2 =4/9 :3/2=4/9 × 2/3=8/27
d) 0,(6) : 0,6 - 2/3=6/9:6/10-2/3=6/9 ×10/6-2/3= 10/9-2/3=(10-6)/9=4/9