2 Задание (на оценку «4») 1.($$\frac{12}{30}$$+$$\frac{4}{5}$$)$$\cdot$$\frac{15}{24}$$ +$$\frac{3}{4}$$\cdot$$3$$\frac{2}{15}$$-1$$\frac{7}{30}$$\cdot$$\frac{3}{4}$$ 2.1$$\frac{2}{11}$$\cdot$$3$$\cdot$$\frac{22}{24}$$

Ответ: 1$$\frac{11}{16}$$; 2$$\frac{3}{4}$$

1. ($$\frac{12}{30}$$+$$\frac{4}{5}$$)$$\cdot$$\frac{15}{24}$$ +$$\frac{3}{4}$$\cdot$$3$$\frac{2}{15}$$-1$$\frac{7}{30}$$\cdot$$\frac{3}{4}$$ =($$\frac{12}{30}$$+$$\frac{24}{30}$$)$$\cdot$$\frac{15}{24}$$ +$$\frac{3}{4}$$\cdot$$\frac{47}{15}$$-$$\frac{37}{30}$$\cdot$$\frac{3}{4}$$ =$$\frac{36}{30}$$\cdot$$\frac{15}{24}$$ +$$\frac{3}{4}$$\cdot$$\frac{47}{15}$$-$$\frac{37}{30}$$\cdot$$\frac{3}{4}$$ =$$\frac{3}{2}$$\cdot$$\frac{1}{2}$$ +$$\frac{47}{20}$$-$$\frac{37}{40}$$\cdot$$\frac{3}{1}$$ =$$\frac{3}{4}$$ +$$\frac{47}{20}$$-$$\frac{111}{120}$$ =$$\frac{90}{120}$$ +$$\frac{282}{120}$$-$$\frac{111}{120}$$ =$$\frac{261}{120}$$ = 1$$\frac{141}{120}$$ = 1$$\frac{47}{40}$$ = 1$$\frac{11}{16}$$
2. 1$$\frac{2}{11}$$\cdot$$3$$\cdot$$\frac{22}{24}$$ =$$\frac{13}{11}$$\cdot$$3$$\cdot$$\frac{22}{24}$$ =$$\frac{13}{1}$$\cdot$$\frac{2}{8}$$ =$$\frac{13}{1}$$\cdot$$\frac{1}{4}$$ =$$\frac{13}{4}$$ = 3$$\frac{1}{4}$$

Ответ: 1$$\frac{11}{16}$$; 2$$\frac{3}{4}$$