Ответ:

Пошаговое объяснение:

Давайте спростимо ці вирази:

2.1a + 5.9a = (2.1 + 5.9)a = 8a

0.52c - 0.38c = (0.52 - 0.38)c = 0.14c

1.6n + n = (1.6 + 1)n = 2.6n

10.3y - 7.4y = (10.3 - 7.4)y = 2.9y

6.7m + 3.9m = (6.7 + 3.9)m = 10.6m

0.8k + k = (0.8 + 1)k = 1.8k

1.2b - 0.4b = (1.2 - 0.4)b = 0.8b

0.57p + 0.48p = (0.57 + 0.48)p = 1.05p

4.5t + 0.7t - 2.4t = (4.5 + 0.7 - 2.4)t = 2.8t

d + 1.7d = (1 + 1.7)d = 2.7d

3.4f - 1.7f = (3.4 - 1.7)f = 1.7f

4.6s + 2.8x + 1.9s = (4.6 + 1.9)s + 2.8x = 6.5s + 2.8x

v + 0.09v = (1 + 0.09)v = 1.09v

1.3x + x = (1.3 + 1)x = 2.3x

1.8g + 0.8g + 0.9g + 2.3 = (1.8 + 0.8 + 0.9 + 2.3)g = 5.8g