Question

Раскройте скобки и приведите подобные слагаемые а) 5a-(8+5a); б) -с+(с-d); в) -(2,8-a)+(-a+8,7); г) -(-6,22+a+b)-(a-b+10,9).

Answer 1

Пошаговое объяснение:

a)5a-(8+5a)=5a-8-5a=-8

б)-c+(c-d)=-c+c-d=-d

в)-(2,8-a)+(-a+8,7)=-2,8+a-a+8,7=5,9

г)-(-6,22+a+b)-(a-b+10,9)=6,22-a-b-a+b-10,9=-4,68-2a

Answer 2

а) 5a - (8 + 5a)

To remove the parentheses, distribute the negative sign to each term inside the parentheses:

5a - 8 - 5a

Now, combine like terms (5a and -5a cancel each other out):

(5a - 5a) - 8 = 0 - 8 = -8

So, the simplified expression is -8.

б) -с + (с - d)

To remove the parentheses, distribute the negative sign to each term inside the parentheses:

-c + с - d

Now, combine like terms (-c and +с cancel each other out):

(-c + с) - d = 0 - d = -d

So, the simplified expression is -d.

в) -(2.8 - a) + (-a + 8.7)

To remove the parentheses, distribute the negative sign to each term inside the parentheses:

-2.8 + a - a + 8.7

Now, combine like terms (a and -a cancel each other out):

(-2.8 + 8.7) = 5.9

So, the simplified expression is 5.9.

г) -(-6.22 + a + b) - (a - b + 10.9)

To remove the parentheses, distribute the negative sign to each term inside the parentheses:

6.22 - a - b - a + b - 10.9

Now, combine like terms (-a and +a, -b and +b cancel each other out):

(6.22 - 10.9) = -4.68

So, the simplified expression is -4.68.