Question

Se dau numerele : a=3×2 ; b=3×4+1 ; c=5×9-20 .Calculeaza:2÷a+b+c; c-b+3×a-b-c.​

Answer 1

Răspuns:

$\frac{2}{3 \times 2 + 3 \times 4 + 1 + 5 \times 9 - 20} = \frac{2}{6 + 12 + 1 + 45 - 20} = \frac{2}{44} simplifici \: cu \: 2 = \frac{1}{22}$

Explicație pas cu pas:

$5 \times 9 - 20 - 3 \times 4 + 1 \times 3 \times 2 - 3 \times 4 + 1 - 5 \times 9 - 20 = 5 \times 9 - 20 - 3 \times 4 + 3 \times 2 - 3 \times 4 + 1 - 5 \times 9 - 20 = - 20 - 12 + 6 - 12 + 1 - 20 = - 64 + 7 = - 57$