Question

Помогите !!!!!!!!!!!!!!!!!!

Answer 1

▪1.
а)
$- 7.4 - 2.9 = - 10.3$
б)
$- 4.1 + 2.8 = - 1.3$
в)
$8.7 - 9.4 = - 0.7$
г)
$- 3.7 + 5.6 = 1.9$
д)
$- \frac{3}{8} + \frac{5}{6} = \frac{ - 3 \times 3 + 5 \times 4}{24} = \frac{ - 9 + 20}{24} = \frac{11}{24}$
е)
$- 3 \frac{5}{9} - 2 \frac{7}{18} = - 5 \frac{10 + 7}{18} = - 5 \frac{17}{18}$
▪2.
$( \frac{1}{30} - \frac{5}{6} ) - ( - 3.9 - 2.2) - 5.3 = \frac{1 - 25}{30} - ( - 6.1) - 5.3 = - \frac{24}{30} + 6.1 - 5.3 = - \frac{4}{5} + 6.1 - 5.3 = - 0.8 + 0.8 = 0$
▪3.
а)
$x - 3.22 = - 8.19 \\ x = - 8.19 + 3.22 \\ x = - 4.97$
б)
$2 \frac{8}{15} + y = - 1 \frac{7}{10} \\ y = - 1 \frac{7}{10} - 2 \frac{8}{15} \\ y = - 3 \frac{21 + 16}{30} = - 3 \frac{37}{30} \\ y = - 4 \frac{7}{30}$
▪4.
|-3,1 - (-0,2)| = |-3,1 + 0,2| = |- 2,9| = 2,9

▪5.
z = -6; -7; -8; 6; 7; 8.