Question

1)1/2+4/7-3/14 2)1/5-2/15+30 3) 1/10+7/20-2/40 4)17/20-3/10-11/60 5)3/20+7/10-3/40 6)9/40+3/4-19/20

Answer 1

Вот решение, удачи!!!

Answer 2

Let's solve the given expressions step by step:

1. 1/2 + 4/7 - 3/14

To add or subtract fractions, we need to find a common denominator. In this case, the common denominator is 14.

1/2 can be written as 7/14. 4/7 remains as 4/7. 3/14 remains as 3/14.

Now, we can add or subtract the fractions:

7/14 + 4/7 - 3/14 = 7/14 + 8/14 - 3/14 = (7 + 8 - 3)/14 = 12/14 = 6/7.

So, the result of 1/2 + 4/7 - 3/14 is 6/7.

2. 1/5 - 2/15 + 30

Here, we have a whole number, 30, which can be written as a fraction over 1.

1/5 remains as 1/5. 2/15 remains as 2/15. 30 can be written as 30/1.

Now, let's find a common denominator, which is 15.

1/5 can be written as 3/15. 2/15 remains as 2/15. 30/1 can be written as 450/15.

Now, we can add or subtract the fractions:

3/15 - 2/15 + 450/15 = (3 - 2 + 450)/15 = 451/15.

So, the result of 1/5 - 2/15 + 30 is 451/15.

3. 1/10 + 7/20 - 2/40

To solve this expression, we need to find a common denominator, which is 40.

1/10 can be written as 4/40. 7/20 can be written as 14/40. 2/40 remains as 2/40.

Now, we can add or subtract the fractions:

4/40 + 14/40 - 2/40 = (4 + 14 - 2)/40 = 16/40 = 2/5.

So, the result of 1/10 + 7/20 - 2/40 is 2/5.

4. 17/20 - 3/10 - 11/60

Let's find a common denominator, which is 60.

17/20 remains as 17/20. 3/10 can be written as 18/60. 11/60 remains as 11/60.

Now, we can add or subtract the fractions:

17/20 - 18/60 - 11/60 = (17 - 18 - 11)/60 = -12/60 = -1/5.

So, the result of 17/20 - 3/10 - 11/60 is -1/5.

5. 3/20 + 7/10 - 3/40

To solve this expression, we need to find a common denominator, which is 40.

3/20 can be written as 6/40. 7/10 can be written as 28/40. 3/40 remains as 3/40.

Now, we can add or subtract the fractions:

6/40 + 28/40 - 3/40 = (6 + 28 - 3)/40 = 31/40.

So, the result of 3/20 + 7/10 - 3/40 is 31/40.

6. 9/40 + 3/4 - 19/20