Question

2)2 1/4+(-5)+1,75 4)7+(-2 1/5)+(-3,8)6)6+(-4 1/2)+1,5 не пишите сразу ответ а поочередно сделайте ​

Answer 1

Ответ:

2)  -1

4)   1

6)   3

Пошаговое объяснение:

2)  2 1/4+(-5)+1,75  =  2 1/4 - 5 + 1 3/4  = -2 3/4 + 1 3/4 = -1

4)  7+ (-2 1/5) + (-3,8)  = 7 - 2 1/5 - 3 4/5 = 4 4/5 - 3 4/5 = 1  

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

Answer 2

2. To add 2 1/4, -5, and 1.75, we can first convert the mixed fraction 2 1/4 to an improper fraction.

2 1/4 = (2 * 4 + 1) / 4 = 9/4

Now we can add the fractions and the decimal:

9/4 + (-5) + 1.75

To add fractions, we need a common denominator. The common denominator here is 4, so we convert -5 to a fraction with a denominator of 4:

-5 = -20/4

Now we can add the fractions:

9/4 + (-20/4) + 1.75

Combining the fractions:

(9 - 20) / 4 + 1.75

Simplifying:

-11/4 + 1.75

To add fractions and decimals, we need to convert the fraction to a decimal. Dividing -11 by 4 gives us -2.75:

-2.75 + 1.75

Adding the decimals:

-2.75 + 1.75 = -1

Therefore, the result is -1.

4. To add 7, -2 1/5, and -3.8, we can first convert the mixed fraction -2 1/5 to an improper fraction:

-2 1/5 = (-2 * 5 + 1) / 5 = -11/5

Now we can add the fractions and the decimal:

7 + (-11/5) + (-3.8)

To add fractions, we need a common denominator. The common denominator here is 5, so we convert 7 to a fraction with a denominator of 5:

7 = 35/5

Now we can add the fractions:

35/5 + (-11/5) + (-3.8)

Combining the fractions:

(35 - 11) / 5 + (-3.8)

Simplifying:

24/5 + (-3.8)

To add fractions and decimals, we need to convert the fraction to a decimal. Dividing 24 by 5 gives us 4.8:

4.8 + (-3.8)

Adding the decimals:

4.8 + (-3.8) = 1

Therefore, the result is 1.

6. To add 6, -4 1/2, and 1.5, we can first convert the mixed fraction -4 1/2 to an improper fraction:

-4 1/2 = (-4 * 2 + 1) / 2 = -9/2

Now we can add the fractions and the decimal:

6 + (-9/2) + 1.5

To add fractions, we need a common denominator. The common denominator here is 2, so we convert 6 to a fraction with a denominator of 2:

6 = 12/2

Now we can add the fractions:

12/2 + (-9/2) + 1.5

Combining the fractions:

(12 - 9) / 2 + 1.5

Simplifying:

3/2 + 1.5

To add fractions and decimals, we need to convert the fraction to a decimal. Dividing 3 by 2 gives us 1.5:

1.5 + 1.5

Adding the decimals:

1.5 + 1.5 = 3

Therefore, the result is 3.