(1 3/5+1,8)·1/2= (5,4-2 1/3):7 2/3=выполните действиепожалуйсто

Решите задачу:

$(1 \frac{3}{5} + 1.8) \times \frac{1}{2} = \\ = (1.6 + 1.8) \div 2 = \\ = 3.4 \div 2 = 1.7 \\$
$(5.4 - 2 \frac{1}{3} ) \div 7 \frac{2}{3} = \\ = (5 \frac{2}{5} - 2 \frac{1}{3} ) \div \frac{23}{3} = \\ = ((5 - 2) + ( \frac{2}{5} - \frac{1}{3} )) \times \frac{3}{23} = \\ = (3 + \frac{1}{15} )\times \frac{3}{23} = \\ = \frac{46}{15} \times \frac{3}{23} = \frac{2}{5} = 0.4$