Question

101 - 95: f) 472 - 1 001 - 472
4. Calculati. punând in evidenţă un factor comum:
a) 4 + 2-3:
b) 3-4-9.
c) 11-22 +33 +44 +55
d) 6 + 9 - 18: e) 30 - 40 + 180: f (101 + 202 + 303 + 404): 101.​

Answer 1

Răspuns:

a) 4+2×3 => 4=2×2 factor comun 2

2×(2+3)=2×5=10

b) 3×4+9 => 9=3×3 factor comun 3

3×(4+3)=3×7=21

c) 11+22+33+44+55 => factor comun 11

11×(1+2+3+4+5)=11×15=165

d) 6+9+18 => factor comun 3

3×(2+3+6)=3×11=33

e) 30+40+180 => factor comun 10

10×(3+4+18)=10×25=250

f) (101+202+303+404): 101 => factor comun 101

101×(1+2+3+4):101=101×10:101=1010:101=10

Sper ca te-am ajutat!!