Ответ:

2. а) [tex]\frac{-37}{30}[/tex] б) [tex]-2\frac{2}{5}[/tex] в) [tex]-5[/tex] г) [tex]-1\frac{17}{25}[/tex]

Пошаговое объяснение:

а) [tex]-3\frac{1}{3} + 2,1 = -\frac{10}{3} + \frac{21}{10} = \frac{-100 + 63}{30} = \frac{-37}{30}[/tex]

б) [tex]2\frac{2}{5} -4,8 = \frac{12}{5} - \frac{48}{10} = \frac{24-48}{10} = -\frac{24}{10} = -\frac{12}{5} = -2\frac{2}{5}[/tex]

в) [tex]1\frac{3}{7} *(-3,5) = \frac{10}{7} * (-\frac{35}{10}) = -\frac{35}{7} =-5[/tex]

г) [tex]-4,32: 2\frac{4}{7} = -\frac{432}{100}:\frac{18}{7} = -\frac{432}{100}*\frac{7}{18}=\frac{42}{25}=-1\frac{17}{25}[/tex]

Ответ:

Пошаговое объяснение:

а)

-3. 1/3 + 2,1 = -3. 1/3 + 2. 1/10 = -3. 10/30 + 2. 3/30 = -1. 7/30

б)

2. 2/5 - 4,8 = 2. 2/5 - 4. 8/10 = 2. 4/10 - 4. 8/10 = -2. 4/10 = -2. 2/5 или -2,4

в)

1. 3/7 * (-3,5) = 1. 3/7 * (-3. 5/10) = 10/7 * (-35/10) = 1/1 * (-5/1) = -5/1 = -5

г)

-4,32 : 2. 4/7 = -4. 32/1 00 : 2. 4/7 =

-432/1 00 : 18/7 = -432/100 * 7/18 = -24/100 * 7/1 = -168/100 = -1. 68/100 =

-1. 17/25 или 1,68