Question

2/5+4/15= 1/3+1/4= 2/3-2/5= 1/5-1/6= 1/2+1/4= 7/6-1= 1/2+2/7= 1/2-1/3= 3/4+1/8= 5/6-7/12= 2/5+3/10= Помогите прошу дам 35 баллов /-дробная черта

Answer 1

Ответ:

2/5+4/15= 10/15 можно сократить до 2/3

1/3+1/4= 7/12

2/3-2/5= 4/15

1/5-1/6= 1/30

1/2+1/4= 3/4

7/6-1= 1/6

1/2+2/7= 11/14

1/2-1/3= 1/6

3/4+1/8= 7/8

5/6-7/12= 3/12 можно сократить до 1/4

2/5+3/10= 7/10

Answer 2

Ответ:

2/5+4/15=(6+4)/15=10/15=2/3

1/3+1/4=(4+3)/12=7/12

2/3-2/5=(10-6) /15=4/15

1/5-1/6=(6-5)/30=1/30

1/2+1/4=3/4

7/6-1=1/6

1/2+2/7=(7+4)/14=11/14

1/2-1/3=1/6

3/4+1/8=7/8

5/6-7/12=3/12=1/4

2/5+3/10=7/10

Пошаговое объяснение:

Answer 3

2/5 + 4/15: To add these fractions, we need to find a common denominator. The smallest number that both 5 and 15 can divide into is 15. Let's rewrite the fractions with a denominator of 15:

2/5 = 6/15 (multiplied numerator and denominator by 3) 4/15 = 4/15

Now we can add the fractions:

6/15 + 4/15 = 10/15

However, we can simplify this fraction by dividing both the numerator and denominator by their greatest common factor, which is 5:

10/15 = (10 ÷ 5) / (15 ÷ 5) = 2/3

So, 2/5 + 4/15 = 2/3.

1/3 + 1/4: To add these fractions, we also need to find a common denominator. The smallest number that both 3 and 4 can divide into is 12. Let's rewrite the fractions with a denominator of 12:

1/3 = 4/12 (multiplied numerator and denominator by 4) 1/4 = 3/12 (multiplied numerator and denominator by 3)

Now we can add the fractions:

4/12 + 3/12 = 7/12

So, 1/3 + 1/4 = 7/12.

2/3 - 2/5: To subtract these fractions, we need a common denominator. The smallest number that both 3 and 5 can divide into is 15. Let's rewrite the fractions with a denominator of 15:

2/3 = 10/15 (multiplied numerator and denominator by 5) 2/5 = 6/15 (multiplied numerator and denominator by 3)

Now we can subtract the fractions:

10/15 - 6/15 = 4/15

So, 2/3 - 2/5 = 4/15.

1/5 - 1/6: To subtract these fractions, we need a common denominator. The smallest number that both 5 and 6 can divide into is 30. Let's rewrite the fractions with a denominator of 30:

1/5 = 6/30 (multiplied numerator and denominator by 6) 1/6 = 5/30 (multiplied numerator and denominator by 5)

Now we can subtract the fractions:

6/30 - 5/30 = 1/30

So, 1/5 - 1/6 = 1/30.

1/2 + 1/4: To add these fractions, we need a common denominator. The smallest number that both 2 and 4 can divide into is 4. Let's rewrite the fractions with a denominator of 4:

1/2 = 2/4 (multiplied numerator and denominator by 2) 1/4 = 1/4

Now we can add the fractions:

2/4 + 1/4 = 3/4

So, 1/2 + 1/4 = 3/4.

7/6 - 1: To subtract a whole number from a fraction, we need to convert the whole number into a fraction with the same denominator. The denominator we can use here is 6:

7/6 - 1 = 7/6 - 6/6 = 1/6

So, 7/6 - 1 = 1/6.

1/2 + 2/7: To add these fractions, we need a common denominator. The smallest number that both 2 and 7 can divide into is 14. Let's rewrite the fractions with a denominator of 14:

1/2 = 7/14 (multiplied numerator and denominator by 7) 2/7 = 4/14 (multiplied numerator and denominator by 2)

Now we can add the fractions:

7/14 + 4/14 = 11/14

So, 1/2 + 2/7 = 11/14.

1/2 - 1/3: To subtract these fractions, we need a common denominator. The smallest number that both 2 and 3 can divide into is 6. Let's rewrite the fractions with a denominator of 6:

1/2 = 3/6 (multiplied numerator and denominator by 3) 1/3 = 2/6 (multiplied numerator and denominator by 2)

Now we can subtract the fractions:

3/6 - 2/6 = 1/6

So, 1/2 - 1/3 = 1/6.

3/4 + 1/8: To add these fractions, we need a common denominator. The smallest number that both 4 and 8 can divide into is 8. Let's rewrite the fractions with a denominator of 8:

3/4 = 6/8 (multiplied numerator and denominator by 2) 1/8 = 1/8

Now we can add the fractions:

6/8 + 1/8 = 7/8

So, 3/4 + 1/8 = 7/8.

5/6 - 7/12: To subtract these fractions, we need a common denominator. The smallest number that both 6 and 12 can divide into is 12. Let's rewrite the fractions with a denominator of 12:

5/6 = 10/12 (multiplied numerator and denominator by 2) 7/12 = 7/12

Now we can subtract the fractions:

10/12 - 7/12 = 3/12

However, we can simplify this fraction by dividing both the numerator and denominator by their greatest common factor, which is 3:

3/12 = (3 ÷ 3) / (12 ÷ 3) = 1/4

So, 5/6 - 7/12 = 1/4.

2/5 + 3/10: To add these fractions, we need a common denominator. The smallest number that both 5 and 10 can divide into is 10. Let's rewrite the fractions with a denominator of 10:

2/5 = 4/10 (multiplied numerator and denominator by 2) 3/10 = 3/10

Now we can add the fractions:

4/10 + 3/10 = 7/10

So, 2/5 + 3/10 = 7/10.

Дроби вычислены следующим образом: 2/5 + 4/15 = 2/3 1/3 + 1/4 = 7/12 2/3 - 2/5 = 4/15 1/5 - 1/6 = 1/30 1/2 + 1/4 = 3/4 7/6 - 1 = 1/6 1/2 + 2/7 = 11/14 1/2 - 1/3 = 1/6 3/4 + 1/8 = 7/8 5/6 - 7/12 = 1/4 2/5 + 3/10 = 7/10

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