Question

Exercițiul 9 cazul a,d,e va rog urgent dau coroana

Answer 1

Răspuns:

a)

$( \frac{5}{1} + \frac{1}{4}) \times 12 = \frac{21}{2}$

d)

$( \frac{7}{15} + \frac{1}{5} ) \times 3 = \frac{2}{3} \times 3 = 2$

e)

$( \frac{3}{7} + \frac{1}{21} ) \times 3 = \frac{10}{7}$

Answer 2

a)(5/8+1/4)×12

amplificam 1/4 cu 2 si este egal cu 2/8

5/8+2/8=7/8

7/8×12=84/96