Question

вообще не понял темы, очень срочно!​

Answer 1

Пошаговое объяснение:

№1

1) -36 + 69 = 69 - 36 = 33

2) 33 + (-17) = 33 - 17 = 16

3) 16 + (-42) = 16 - 42 = -(42 - 16) = -26

4) -26 + 32 = 32 - 26 = 6

№2

1) -8 - (-12) = -8 + 12 = 12 - 8 = 4

2) 4 - (-7) = 4 + 7 = 11

3) 11 + 12 = 23

4) 23 - 20 = 3

№3

1) 2 3/4 - (-1 1/2) = 2 3/4 + 1 1/2 = 2 3/4 + 1 2/4 = 3 5/4 = 4 1/4

2) 4 1/4 + (-3 5/6) = 4 1/4 - 3 5/6 = 4 3/12 - 3 10/12 =

3 15/12 - 3 10/12 = 5/12