ПОМОГИТЕ!!! СРОЧНО, ДАМ 35 БАЛЛОВ!!!

Ответ:

$1)(0.4 \times 2.38 - 3.452) \div 4\frac{1}{2 } \times 2 \frac{4}{9} \\ = 0.952 - 3.452 = - 2.5 = - 2.5 \div \frac{9}{2} \times \frac{22}{9} \\ = - 2.5 \div \frac{9 \times 2}{18} \times \frac{22 \times 2}{18} = - 2.5 \div \frac{18}{18} \times \frac{44}{18} = \\ = - 2.5 \div 1 \times 44.18 = - 2.5 \times 44.18 = - 110.45 \\ \\ 2)2 \frac{5}{14} \times 2 \frac{1}{4} \div (0.6 \times 3.25 - 5.468 = \\ = \frac{33}{14} \times \frac{9}{4} \div (1.95 - 3.518) = \frac{33 \times 4}{56} \times \frac{9 \times 14}{56} = \\ = \frac{132}{56} \times \frac{126}{56} \div ( - 1.568) = 2.35 \times 0.46 \div ( - 1.568) = \\ = 1.081 \div ( - 1.568) = 0.689 \\ \\ 3)(0.4 \times 1.25 - 2.25) \div 0.5 \times \frac{1}{2} = - 2 \div 0.5 \times \frac{1}{2} = \\ = - 4 \times \frac{1}{2} = - 2 \\ \\ 4) - 2 \frac{1}{4} \times 0.54 \div (0.8 \times 22.5 - 22.5) = \\ = - \frac{9}{4} \times 0.54 \div 157.5 = - 2.25 \times 0.54 \div 157.5 = \\ = - 1.215 \div 157.5 = - 0.007714$