Question

2. Dacă a = 18 şi b+c=57, calculați valoarea expresiilor:
a) a + b + c;
b) a +5× b+5×c;
c) 3×a +2×b +2×c;
d) a × b + a×c+7×b+7×c. cn raspunde la toate are coroana!!! ​

Answer 1

Răspuns:

a)a+b+c=18+57=75

b)a+5b+5c=18+(57×5)=

=18+285=303

c)3×a+2b+2c=18×3+57×2=

=54+114=168

d)a×b+a×c+7×b+7×c=18×57+7×57=

=1026 +399=1425