Question

Б)1/3+1/5Г)1/3-1/7Е)9/20+3/8З)13/50-17/75К)7/15-0

Answer 1

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Answer 2

Б) 1/3 + 1/5

To add fractions, you need to have a common denominator. In this case, the common denominator is 15, which is the product of 3 and 5.

1/3 can be multiplied by 5/5 to get 5/15. 1/5 can be multiplied by 3/3 to get 3/15.

Now, you can add the fractions: 1/3 + 1/5 = 5/15 + 3/15 = 8/15

So, the answer to 1/3 + 1/5 is 8/15.

Г) 1/3 - 1/7

To subtract fractions, you also need a common denominator. In this case, the common denominator is 21, which is the product of 3 and 7.

1/3 can be multiplied by 7/7 to get 7/21. 1/7 can be multiplied by 3/3 to get 3/21.

Now, you can subtract the fractions: 1/3 - 1/7 = 7/21 - 3/21 = 4/21

So, the answer to 1/3 - 1/7 is 4/21.

Е) 9/20 + 3/8

To add fractions with different denominators, you need to find a common denominator. In this case, the least common multiple (LCM) of 20 and 8 is 40.

9/20 can be multiplied by 2/2 to get 18/40. 3/8 can be multiplied by 5/5 to get 15/40.

Now, you can add the fractions: 9/20 + 3/8 = 18/40 + 15/40 = 33/40

So, the answer to 9/20 + 3/8 is 33/40.

З) 13/50 - 17/75

To subtract fractions with different denominators, you need to find a common denominator. In this case, the least common multiple (LCM) of 50 and 75 is 150.

13/50 can be multiplied by 3/3 to get 39/150. 17/75 can be multiplied by 2/2 to get 34/150.

Now, you can subtract the fractions: 13/50 - 17/75 = 39/150 - 34/150 = 5/150

To simplify the fraction, you can divide both the numerator and denominator by their greatest common divisor (GCD), which is 5: 5/150 ÷ 5/5 = 1/30

So, the answer to 13/50 - 17/75 is 1/30.

К) 7/15 - 0

Any number subtracted by 0 is equal to the number itself. Therefore:

7/15 - 0 = 7/15

So, the answer to 7/15 - 0 is 7/15.