Упр.20.4 ГДЗ Рабочая тетрадь Зубарева 6 класс Мнемозина (Математика)

Заполните цепочки.

1) $$-\frac{4}{5}:2=-\frac{4}{5}\cdot\frac{1}{2}=-\frac{2}{5}$$

$$-\frac{2}{5}+2=1\frac{3}{5}$$

$$1\frac{3}{5}-2=-\frac{2}{5}$$

$$-\frac{4}{5}-\frac{1}{5}=-1$$

$$-1\cdot(-3)=3$$

2) $$-\frac{1}{2}-\frac{5}{14}=-\frac{7}{14}-\frac{5}{14}=-\frac{12}{14}=-\frac{6}{7}$$

$$-\frac{6}{7}:3=-\frac{6}{7}\cdot\frac{1}{3}=-\frac{2}{7}$$

$$-\frac{1}{2}\cdot(-4)=2$$

$$2-\frac{2}{3}=1\frac{1}{3}$$

$$-\frac{2}{7}\cdot 3=-\frac{6}{7}$$

3) $$-\frac{1}{3}+3\frac{1}{6}=3\frac{1}{6}-\frac{1}{3}=2\frac{5}{6}$$

$$-\frac{1}{3}\cdot 6=-2$$

$$-2-\frac{1}{4}=-2\frac{1}{4}$$

$$-\frac{9}{4}:2=-\frac{9}{8}=-1\frac{1}{8}$$

$$2\frac{5}{6}-3\frac{1}{6}=-\frac{1}{3}$$

$$-\frac{1}{3}\cdot 6=-2$$

$$-2-\frac{1}{4}=-2\frac{1}{4}$$

$$-2\frac{1}{4}:2=-1\frac{1}{8}$$

4) $$2\frac{6}{11}+3\frac{5}{11}=5\frac{11}{11}=6$$

$$2\frac{6}{11}:(-2)=-\frac{14}{11}$$

$$-\frac{14}{11}+\frac{7}{11}=-\frac{7}{11}$$

$$-\frac{7}{11}\cdot\frac{11}{14}=-\frac{1}{2}$$

$$6-3\frac{5}{11}=2\frac{6}{11}$$

$$2\frac{6}{11}:(-2)=-\frac{14}{11}$$

$$-\frac{14}{11}+\frac{7}{11}=-\frac{7}{11}$$

$$-\frac{7}{11}\cdot\frac{11}{14}=-\frac{1}{2}$$

5) $$-\frac{1}{8}-\frac{5}{8}=-\frac{6}{8}=-\frac{3}{4}$$

$$-\frac{3}{4}\cdot 3=-\frac{9}{4}$$

$$-\frac{9}{4}+\frac{1}{4}=-2$$

$$-\frac{1}{8}\cdot\left(-2\frac{2}{3}\right)=\frac{1}{3}$$

$$-2-\frac{1}{4}=-2\frac{1}{4}$$

$$-2\frac{1}{4}:3=-\frac{3}{4}$$

$$-\frac{3}{4}+\frac{5}{8}=-\frac{1}{8}$$

$$-\frac{1}{8}\cdot\left(-2\frac{2}{3}\right)=\frac{1}{3}$$