Question

Помогите плиз*** это примеры на дроби) а)1\3 + о,25 б)-3\7 +1,2 в) 0,4 + 5\6 г) -1\3 - 5\7)))РАСПИШИТЕ ЕСЛИ НЕ СЛОЖНО В СТРОЧКУ* (кто может)

Answer 1

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ответ в файлах:

Answer 2

Примеры на дроби

а) 1/3 + 0,25 б) -3/7 + 1,2 в) 0,4 + 5/6 г) -1/3 - 5/7

а) 1/3 + 0,25 To add these fractions, we need to find a common denominator. The common denominator for 3 and 4 is 12. So, we can rewrite the fractions as follows:

1/3 = 4/12 0,25 = 3/12

Now, we can add the fractions:

4/12 + 3/12 = 7/12

Therefore, 1/3 + 0,25 = 7/12.

б) -3/7 + 1,2 To add these fractions, we need to convert the decimal number 1.2 into a fraction. Since 1.2 is equivalent to 1 2/10 or 1 1/5, we can rewrite it as:

1.2 = 1 1/5 = 6/5

Now, we can add the fractions:

-3/7 + 6/5

To find a common denominator, we multiply the denominators:

7 * 5 = 35

Now, we can rewrite the fractions with the common denominator:

-3/7 = -15/35 6/5 = 42/35

Now, we can add the fractions:

-15/35 + 42/35 = 27/35

Therefore, -3/7 + 1.2 = 27/35.

в) 0,4 + 5/6 To add these fractions, we need to find a common denominator. The common denominator for 6 and 10 is 30. So, we can rewrite the fractions as follows:

0,4 = 12/30 5/6 = 25/30

Now, we can add the fractions:

12/30 + 25/30 = 37/30

Therefore, 0,4 + 5/6 = 37/30.

г) -1/3 - 5/7 To subtract these fractions, we need to find a common denominator. The common denominator for 3 and 7 is 21. So, we can rewrite the fractions as follows:

-1/3 = -7/21 5/7 = 15/21

Now, we can subtract the fractions:

-7/21 - 15/21 = -22/21

Therefore, -1/3 - 5/7 = -22/21.