Рскройте сскобки и упростите: 1) n + (n+3) + (n+6) = ... 2) (n-10) + (n-1) + (n+1) = ... 3) (n-10) + (n-5) + n + (n+5) = ... 4) (p-5) - (p+5) = ... 5) (p+5) - (p-5) = ... 6) p - (p-5) + (p+5) = ... 7) 4 (2a-1/4) = ... (1/4 - одна четвертая) 8) 0,5 (6x+2) = ... 9) - 3 (3c+1) = ... 10) - 10 (0,1b-0,5) = ... 11) by+by+by+3 = ... 12) 2x+3y-4x-4y+1 = ... 13) 7a-4-a+5+2a-1 = ...

Question

Варвара Зубкова

Математика

18 октября, 06:52

Рскройте сскобки и упростите: 1) n + (n+3) + (n+6) = ... 2) (n-10) + (n-1) + (n+1) = ... 3) (n-10) + (n-5) + n + (n+5) = ... 4) (p-5) - (p+5) = ... 5) (p+5) - (p-5) = ... 6) p - (p-5) + (p+5) = ... 7) 4 (2a-1/4) = ... (1/4 - одна четвертая) 8) 0,5 (6x+2) = ... 9) - 3 (3c+1) = ... 10) - 10 (0,1b-0,5) = ... 11) by+by+by+3 = ... 12) 2x+3y-4x-4y+1 = ... 13) 7a-4-a+5+2a-1 = ...

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Даниил Уваров · Answer 1

1) n + n + 3 + n + 6 = 3 * n + 9;

2) n - 10 + n - 1 + n + 1 = 3 * n - 10;

3) n - 10 + n - 5 + n + n + 5 = 4 * n - 10;

4) (p - 5) - (p + 5) = p - 5 - p - 5 = - 10;

5) (p + 5) - (p - 5) = p + 5 - p + 5 = 10;

6) p - (p - 5) + (p + 5) = p - p + 5 + p + 5 = p + 10;

7) 4 * (2 * a - 1/4) = 4 * 2 * a - 4 * 1/4 = 8 * a - 4/4 = 8 * a - 1;

8) 0,5 * (6 * x + 2) = 0,5 * 6 * x + 0,5 * 2 = 3 * x + 1;

9) - 3 * (3 * c + 1) = - 3 * 3 * c + (-3) * 1 = - 9 * c - 3;

10) - 10 * (0,1 * b - 0,5) = - 10 * 0,1 * b - (-10) * 0,5 = - 1 * b + 5 = 5 - b;

11) by + by + by + 3 = 3 * by + 3 = 3 * (by + 1);

12) 2 * x + 3 * y - 4 * x - 4 * y + 1 = 1 - х - у;

13) 7 * a - 4 - a + 5 + 2 * a - 1 = 8 * а.