Question

-6,5 + 2 3/4= ? 2 4/5 + (-6) =?

Answer 1

Ответ:

-3.75 и -3.2

Пошаговое объяснение:

-6.5+2 3/4=-6.5+2.75=-3.75

2 4/5+(-6)=2,8-6=-3.2

Answer 2

1) приводим к общему знаменателю: -6 10/20+2 15/20, вычисляем: ответ - -3 15/20

2) превращаем в дробь: 2 4/5 +(-5 5/5)=-3 1/5 =3,20

Answer 3

Let's solve the expressions step by step:

1. -6 5/1 + 2 3/4: To add these two mixed numbers, we first need to find a common denominator. In this case, the common denominator is 4.

-6 5/1 + 2 3/4 = -6 20/4 + 2 3/4

Now, add the whole numbers and fractions separately:

Whole numbers: -6 + 2 = -4 Fractions: 20/4 + 3/4 = (20 + 3)/4 = 23/4

So the result is: -4 23/4.

2. 2 4/5 + (-6): To add a positive number and a negative number, we treat the negative number as a subtraction.

2 4/5 - 6: First, find a common denominator for 5 and 1 (since 6 can be written as 6/1).

Common denominator = 5

2 4/5 - 6 = 2 4/5 - 30/5

Now, subtract the fractions:

Whole numbers: 2 - 6 = -4 Fractions: 4/5 - 30/5 = (4 - 30)/5 = -26/5

So the result is: -4 - 26/5 or, converting the improper fraction to a mixed number: -4 6/5.