Question

2Привести подобные: 1) -a + b + 2a - 3b; 2) 4x - Зу - x + у; 3) 3m - 4n + 2n - 3m; 4) 7a - 10b + b - 7a; 5) 25k - 12n + 7k + 7n + 12n; 6) 0,5m + 2z + 5m - 4z - 5m;

Answer 1

Ответ:

1) -a + b + 2a - 3b=а-2b

2) 4x - Зу - x + у=3х-2у

3) 3m - 4n + 2n - 3m=-2n

4) 7a - 10b + b - 7a=-9b

5) 25k - 12n + 7k + 7n + 12n=32k+7n

6) 0,5m + 2z + 5m - 4z - 5m=0,5m-2z

Answer 2

1. -a + b + 2a - 3b = (2a - a) + (b - 3b) = a - 2b

2. 4x - Зу - x + у = (4x - x) + (у - Зу) = 3x + (у - Зу) = 3x + у - Зу

3. 3m - 4n + 2n - 3m = (3m - 3m) + (-4n + 2n) = 0 + (-2n) = -2n

4. 7a - 10b + b - 7a = (7a - 7a) + (-10b + b) = 0 + (-9b) = -9b

5. 25k - 12n + 7k + 7n + 12n = (25k + 7k) + (-12n + 7n + 12n) = 32k + 7n

6. 0,5m + 2z + 5m - 4z - 5m = (0.5m + 5m - 5m) + (2z - 4z) = 0.5m + (-2z) = 0.5m - 2z