7 - 30 24: ж) 60; 84 ) 2 m; m 7 32 3) 70 5k- 4-

Привет! Разберёмся с примерами:

• г) \[ \frac{7}{30} \cdot 24 = \frac{7 \cdot 24}{30} = \frac{7 \cdot 4}{5} = \frac{28}{5} = 5 \frac{3}{5} \]

• д) \[ 32 \cdot \frac{3}{40} = \frac{32 \cdot 3}{40} = \frac{8 \cdot 3}{10} = \frac{4 \cdot 3}{5} = \frac{12}{5} = 2 \frac{2}{5} \]

• ж) \[ \frac{1}{84} \cdot 60 = \frac{60}{84} = \frac{15}{21} = \frac{5}{7} \]

• з) \[ 70 \cdot \frac{5}{126} = \frac{70 \cdot 5}{126} = \frac{10 \cdot 5}{18} = \frac{5 \cdot 5}{9} = \frac{25}{9} = 2 \frac{7}{9} \]

• и) \[ \frac{2}{m} \cdot m = 2 \]

• к) \[ 5k \cdot \frac{7}{4} = \frac{5k \cdot 7}{4} = \frac{35k}{4} \]