Question

Помогите пожалуйста!

Answer 1

$25 \times 18.4 \times 0.04 = 1 \times 18.4 = 18.4$

$0.05 \times 9.1 \times 2 = 0.1 \times 9.1 = 0.91$

$3.72 \times 0.32 + 0.68 \times 3.72 = 3.72(0.32 + 0.68) = 3.72 \times 1 = 3.72$

$6.5 \times 2.46 - 2.44 \times 6.5 = 6.5 \times (2.46 - 2.44) = 6.5 \times 0.02 = 0.13$

$0.9 \times 0.6d = 0.54d = 0.54 \times 0.02 = 0.0108$

$0.05x \times 0.2y = 0.01xy = 0.01 \times 10 \times 2.3 = 0.1 \times 2.3 = 0.23$

$4.2k + 15.8k = (4.2 + 15.8)k = 20k = 20 \times 1.4 = 28$

$0.6a + 8.7a - 2.3a - 3.5 = (0.6 + 8.7 - 2.3)a - 3.5 = 7a - 3.5 = 7 \times 0.9 - 3.5 = 6.3 - 3.5 = 2.8$