Ответ:

а)

0,3-3=-2,7

б)

-1,4-5,8=-7,2

в)

-2,4+0,9=-1,5

г)

[tex] - 4.6 + 4 \frac{3}{5} = - \frac{46}{10} + \frac{23}{5} = - \frac{46}{10} + \frac{46}{10 } = 0[/tex]

д)

-2,9×(-0,2)=0,58

е)

[tex]1.2 \div ( - \frac{3}{25} ) = \frac{12}{10} \div ( - \frac{3}{25} ) = - \frac{12 \times 25}{10 \times 3} = - \frac{4 \times 5}{2} = - \frac{20}{2} = - 10[/tex]

ж)

-4,048÷(-0,8)=5,06

з)

[tex] - 1.35 \times \frac{2}{3} = - \frac{135}{100} \times \frac{2}{3} = - \frac{45}{50} = - \frac{9}{10} [/tex]