Question

399. Найдите значение выражения
1) -3/4 + ( -5 1/4) =
2) -11 3/4 + ( -5 3/4) =
3) -7/8 + ( -1/4) =
4) -9/11 + ( -4 3/11) =
5) -3/17 + ( -11/34) =
6) -7/12 + ( -8 1/6) =
помогите пожалуйста
даю 60балов​

Answer 1

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

-11 3/4 + (-5 3/4) = -17 1/2

-7/8 + (-1/4) = -1 1/8

-9/11 + (-4 3/11) = -5

-3/17 + (-11/34) = -5/4

-7/12 + (-8 1/6) = -9 1/3

Answer 2

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

-3/4 + (-5) = -3/4 - 20/4 = -23/4

-23/4 - 1/4 = -24/4 = -6

2) -11 3/4 + (-5 3/4)

-11 + (-5) = -16

3/4 + 3/4 = 6/4 = 3/2

-11 3/4 + (-5 3/4) = -16 3/2.

3) -7/8 + (-1/4)

-7/8 + (-1/4) = -7/8 - 2/8 = -9/8

4) -9/11 + (-4 3/11)

-9/11 + (-4) = -9/11 - 44/11 = -53/11

-53/11 + 3/11 = -50/11

5) -3/17 + (-11/34)

-3/17 + (-11/34) = -6/34 - 11/34 = -17/34

6) -7/12 + (-8 1/6)

-7/12 + (-8) = -7/12 - 96/12 = -103/12

-103/12 - 2/12 = -105/12 = -35/4

відповідь:

1) -6

2) -16 3/2

3) -9/8

4) -50/11

5) -17/34

6) -35/4