Question

Помогите с Математикой даю 100 баллов за 1 задания​

Answer 1

1)

$a = - 7 \frac{7}{10} = - 7.7\\ b = 20\\ a + b = - 7.7 + 20 = 12.3 \\ a - b = - 7.7 - 20 = - 27.7 \\ |a + b| = | - 7.7 + 20| = |12.3| = 12.3 \\ |a - b| = | - 7 .7 - 20| = | - 27.7| = 27.7 \\ |a| - |b| = | - 7.7| - |20| = 7.7 - 20 = - 12.3 \\ |b| - |a| = |20| - | - 7.7| = 20 - 7.7 = 12.3$

2)

$a = 18 \\ b = - 2.3\\ a + b = 18 - 2.3 = 15.7 \\ a - b =18 - ( - 2.3) = 18 + 2.3 = 20.3 \\ |a + b| = |18 - 2.3| = |15.7| = 15.7\\ |a - b| = |18 - ( - 2.3)| = |18 + 2.3| = |20.3| = 20.3\\ |a| - |b| = |18| - | - 2.3| = 1 8- 2.3 = 15.7 \\ |b| - |a| = | -2 .3| - |18| = 2.3 - 18 = - 15.7$

3)

$a = - 2.9 \\ b = - 47 \\ a + b = - 2.9 - 47 = - 49.9 \\ a - b = - 2.9 - ( - 47) = - 2.9 + 47 = 44.1 \\ |a + b| = | - 2.9 - 47| = | - 49.9| = 49.6\\ |a - b| = | - 2.9 - ( - 47)| = | - 2.9 + 47| = |44.1| = 44.1 \\ |a| - |b| = | - 2.9| - | - 47| = 2.9 - 47 = - 44.1\\ |b| - |a| = | - 47| - | - 2.9| = 47 - 2.9 = 44.1$

4)

$a = - 3.4 \\ b =7.5 \\ a + b = - 3.4 + 7.5 = 4.1 \\ a - b = - 3.4 - 7.5 = - 10.9 \\ |a + b| = | - 3.4 + 7.5| = |4.1| = 4.1\\ |a - b| = | - 3.4 - 7.5| = | - 10.9| = 10.9 \\ |a| - |b| = | - 3.4| - |7.5| = 3.4 - 7.5 = - 4.1 \\ |b| - |a| = |7.5| - | - 3.4| = 7.5 - 3.4 = 4.1$

5)

$a =6.5 \\ b = - 4.9 \\ a + b =6.5 - 4.9 = 1.6 \\ a - b = 6.5 - ( - 4.9) = 6.5 + 4.9 = 11.4 \\ |a + b| = |6.5 - 4.9| = |1.6| = 1.6 \\ |a - b| = |6.5 - ( - 4.9)| = |6.5 + 4.9| = |11.4| = 11.4 \\ |a| - |b| = |6.5| - | - 4.9| = 6.5 - 4.9 = 1.6\\ |b| - |a| = | - 4.9| - |6.5| = 4.9 - 6.5 = - 1.6$