Д. приведите подобные слагаемые 1) 0,3x - 1,5x + 2x = 2)-5,7a+6a + 0,2a = 3) 0,33y - 0,83y - 3y = 4) \frac{2}{5} t+\frac{4}{5} t-3t = 5) 1 \frac{1}{3} m-2 \frac{1}{3} m+\frac{5}{7} m = 6) -2 \frac{6}{7} b-\frac{3}{7} b-1 \frac{4}{7} b= 7) 0,3k+\frac{1}{2} k-1 = 8) -\frac{2}{3} c -\frac{2}{3} c+\frac{1}{3} = 9) \frac{17}{23} -\frac{2}{3} p+\frac{2}{3} p =

1. 1) 0,3x - 1,5x + 2x = (0,3 - 1,5 + 2)x = 0,8x

2. 2) -5,7a + 6a + 0,2a = (-5,7 + 6 + 0,2)a = 0,5a

3. 3) 0,33y - 0,83y - 3y = (0,33 - 0,83 - 3)y = -3,5y

4. 4) \[-\frac{2}{5} t + \frac{4}{5} t - 3t = (-\frac{2}{5} + \frac{4}{5} - 3)t = (\frac{2}{5} - 3)t = (\frac{2}{5} - \frac{15}{5})t = -\frac{13}{5}t = -2,6t\]

5. 5) \[1 \frac{1}{3} m - 2 \frac{1}{3} m + \frac{5}{7} m = \frac{4}{3}m - \frac{7}{3}m + \frac{5}{7}m = (\frac{4}{3} - \frac{7}{3} + \frac{5}{7})m = (-\frac{3}{3} + \frac{5}{7})m = (-1 + \frac{5}{7})m = (-\frac{7}{7} + \frac{5}{7})m = -\frac{2}{7}m\]

6. 6) \[-2 \frac{6}{7} b - \frac{3}{7} b - 1 \frac{4}{7} b = -\frac{20}{7}b - \frac{3}{7}b - \frac{11}{7}b = (-\frac{20}{7} - \frac{3}{7} - \frac{11}{7})b = -\frac{34}{7}b = -4 \frac{6}{7}b\]

7. 7) 0,3k + \frac{1}{2} k - 1 = 0,3k + 0,5k - 1 = (0,3 + 0,5)k - 1 = 0,8k - 1

8. 8) \[-\frac{2}{3} c - \frac{2}{3} c + \frac{1}{3} = (-\frac{2}{3} - \frac{2}{3})c + \frac{1}{3} = -\frac{4}{3}c + \frac{1}{3}\]

9. 9) \[\frac{17}{23} - \frac{2}{3} p + \frac{2}{3} p = \frac{17}{23} + (-\frac{2}{3} + \frac{2}{3})p = \frac{17}{23} + 0p = \frac{17}{23}\]

Ответ: 1) 0,8x; 2) 0,5a; 3) -3,5y; 4) -2,6t; 5) -\frac{2}{7}m; 6) -4 \frac{6}{7}b; 7) 0,8k - 1; 8) -\frac{4}{3}c + \frac{1}{3}; 9) \frac{17}{23}