Inserisci, se necessario, le parentesi in modo da ottenere uguaglianze vere:
a. $6+6: 2+2 \cdot 2=22$
b. $6+6: 2+2 \cdot 2=2$
c. $6+6: 2+2 \cdot 2=7$
d. $6+6: 2+2 \cdot 2=16$
Inserisci, se necessario, le parentesi in modo da ottenere uguaglianze vere:
a. $6+6: 2+2 \cdot 2=22$
b. $6+6: 2+2 \cdot 2=2$
c. $6+6: 2+2 \cdot 2=7$
d. $6+6: 2+2 \cdot 2=16$
(164)
a)
6 + 6/2 + 2*2 = 22
(6 + 6/2 + 2)*2 = 22
(6+3+2)*2 = 22
11*2 = 22
b)
6 + 6/2 + 2*2 = 2
(6 + 6)/(2 + 2*2) = 2
12/6 = 2
c)
6 + 6/2 + 2*2 = 7
6 + 6/(2 + 2*2) = 7
6+6/6 = 7
6+1 = 7
d)
6 + 6/2 + 2*2 = 16
6 + (6/2 + 2)*2 = 16
6+(3+2)*2 = 16
6+10 = 16
164)
a) $(6+6 : 2+2)×2 = (6+3+2)×2 = 11×2 = 22$;
b) $(6+6) : (2+2×2) = 12 : (2+4) = 12 : 6 = 2$;
c) $ 6+6 : (2+2×2) = 6 + 6 : (2+4) = 6+ 6 : 6 = 6+1 = 7$;
d) $[(6+6) : 2 + 2]×2 = [12 : 2 +2]×2 = [6+2]×2 = 8×2 = 16$.