Question

7) 2/5+7/10+3/4. 8) 5/10+1/4+1/5 9)4/5+4/10+1/2 10)3/5+3/4+6/10​

Answer 1

Ответ:

ниже

Пошаговое объяснение:

2/5+7/10+3/4= 16/40+28/40+30/40=74/40= 1 34/40

5/10+1/4+1+5=20/40+10/40+8/40=38/40

4/5+4/10+1/2=8/10+4/10+5/10=17/10=1 7/10

3/5+3/4+6/10=24/40+30/40+24/40=78/40=1 38/40

Answer 2

Let's simplify the given expressions:

8. 2/5 + 7/10 + 3/4:

To add fractions with different denominators, we need to find a common denominator. In this case, the least common multiple (LCM) of 5, 10, and 4 is 20.

Multiplying the first fraction by 4/4, the second fraction by 2/2, and the third fraction by 5/5, we get:

(2/5) * (4/4) + (7/10) * (2/2) + (3/4) * (5/5) = 8/20 + 14/20 + 15/20

Now we can add the fractions:

8/20 + 14/20 + 15/20 = (8 + 14 + 15)/20 = 37/20

Therefore, 2/5 + 7/10 + 3/4 simplifies to 37/20.

9. 5/10 + 1/4 + 1/5:

To add fractions with different denominators, we need to find a common denominator. In this case, the least common multiple (LCM) of 10, 4, and 5 is 20.

Multiplying the first fraction by 2/2, the second fraction by 5/5, and the third fraction by 4/4, we get:

(5/10) * (2/2) + (1/4) * (5/5) + (1/5) * (4/4) = 10/20 + 5/20 + 4/20

Now we can add the fractions:

10/20 + 5/20 + 4/20 = (10 + 5 + 4)/20 = 19/20

Therefore, 5/10 + 1/4 + 1/5 simplifies to 19/20.

10. 4/5 + 4/10 + 1/2:

To add fractions with different denominators, we need to find a common denominator. In this case, the least common multiple (LCM) of 5, 10, and 2 is 10.

Multiplying the first fraction by 2/2, the second fraction by 1/1, and the third fraction by 5/5, we get:

(4/5) * (2/2) + (4/10) * (1/1) + (1/2) * (5/5) = 8/10 + 4/10 + 5/10

Now we can add the fractions:

8/10 + 4/10 + 5/10 = (8 + 4 + 5)/10 = 17/10

Therefore, 4/5 + 4/10 + 1/2 simplifies to 17/10.

11. 3/5 + 3/4 + 6/10:

To add fractions with different denominators, we need to find a common denominator. In this case, the least common multiple (LCM) of 5, 4, and 10 is 20.

Multiplying the first fraction by 4/4, the second fraction by 5/5, and the third fraction by 2/2, we get:

(3/5) * (4/4) + (3/4) * (5/5) + (6/10) * (2/2) = 12/20 + 15/20 + 12/20

Now we can add the fractions:

12/20 + 15/20 + 12/20 = (12 + 15 + 12)/20 = 39/20

Therefore, 3/5 + 3/4 + 6/10 simplifies to 39/20.