Răspuns:
1.
a)21+2=23
b)123
c)x:7=16 rest 5
x=16×7+5
x=117
2.
a) x+y=13
z=8
xz+yz=
z×(x+y)=
8×13=104
b) [tex]2 {}^{32} \div 2 {}^{30} \\ 2 {}^{2} egal \: 4[/tex]
c) [tex] \frac{1}{4} {}^{2} + \frac{3}{8} {}^{} \\ \frac{2}{8} + \frac{3}{8} \\ \frac{5}{8} [/tex]
3.
a)L=8; l=6
a)[tex] \frac{8}{6} [/tex]
b)[tex] \frac{6}{28} [/tex]
c)[tex] \frac{28}{8} [/tex]
