Question

7 1/5+(−15,23)= (десятичная дробь).

Answer 1

Ответ:

-8.03

Пошаговое объяснение:

7 1/5+(−15,23)= 36/5 - 1523/100 = 36*20 /100 - 1523/100 =(720- 1523)/100= -8.03

Answer 2

To solve the expression, let's first convert the mixed number 7 1/5 to an improper fraction and then perform the addition with the decimal number -15.23.

Step 1: Convert 7 1/5 to an improper fraction. To convert the mixed number 7 1/5 to an improper fraction, multiply the whole number (7) by the denominator of the fraction (5) and add the numerator (1). Then, keep the same denominator.

7 1/5 = (7 * 5 + 1) / 5 = 36 / 5

Step 2: Add the decimal number -15.23 to the improper fraction.

36 / 5 + (-15.23)

Step 3: Convert the decimal number to a fraction.

Since -15.23 has two decimal places, we can express it as -1523/100.

Step 4: Add the fractions.

36 / 5 + (-1523 / 100)

To add fractions, we need a common denominator. The common denominator for 5 and 100 is 100.

Step 5: Convert both fractions to have a common denominator of 100.

36 / 5 = (36 * 20) / (5 * 20) = 720 / 100 -1523 / 100 (already in the desired form)

Step 6: Add the fractions.

720 / 100 + (-1523 / 100) = (720 - 1523) / 100 = -803 / 100

Finally, the result is -803/100 as a decimal number, which is approximately -8.03.