Question

Calculați, scoțând factor comun:

a) 7 • 5 + 3 • 5;

b) 8 • 11 - 8 • 1;

c) 4 • 9 + 6 • 4;

d) 44 • 876 + 876 • 56;

e) 178 • 7 + 178 • 98 - 5 • 178;

f) 7x + 7y - 7z;

g) 10 + 2a.

Mulțumesc!

Answer 1

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Answer 2

a)7•5+3•5=

35+15=

50

b)8•11-8•1=

88-8=

80

c)4•9+6•4=

36+24=

60

d)44•876+876•56=

38544+49056=

87600

e)178•7+178•98-5•178=

1246+17444-890=

18690-890=

17800

$f)7x + 7y + 7z = \\ \\ 7( \frac{7x}{7} + \frac{7y}{7} + \frac{-7z}{7}) = \\ \\ 7(x + y - z)$

$g)10 + 2a = \\ \\ 2( \frac{10}{2} + \frac{2a}{2}) = \\ \\ 2(5 + a)$