Question

6/7 - 4/7 =? 7/12 + 1/4=? 7/21 * 9/14 15/24 : 25/48

Answer 1

Ответ:

Пошаговое объяснение:

1) 6/7 - 4/7 = 2/7

2) 7/12 + 3/12 = 10/12 = 5/6

3) 7/21 * 9/14 = 3/14

4) 15/24 * 48/25 = 6/5 = 1,2

Answer 2

Ответ:

Пошаговое объяснение:1)6/7-4/7=2/7

2)7/12+1/4=10/12

3)7/21*9/14=3/14

4)15/24:25/48=6/5=1,2

Answer 3

Let's solve each of the expressions step by step:

1. 6/7 - 4/7: When subtracting fractions with the same denominator, you simply subtract the numerators while keeping the denominator unchanged.

(6/7) - (4/7) = (6 - 4) / 7 = 2/7

2. 7/12 + 1/4: Before adding fractions, you need to find a common denominator. The common denominator for 12 and 4 is 12, so we'll convert both fractions:

(7/12) + (1/4) = (7/12) + (3/12) = (7 + 3) / 12 = 10/12

Now, we can simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 2 in this case:

10/12 = (10 ÷ 2) / (12 ÷ 2) = 5/6

3. 7/21 * 9/14: To multiply fractions, simply multiply the numerators together and the denominators together:

(7/21) * (9/14) = (7 * 9) / (21 * 14) = 63 / 294

Now, we can simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 21 in this case:

63/294 = (63 ÷ 21) / (294 ÷ 21) = 3/14

4. (15/24) : (25/48): When dividing fractions, you need to invert the second fraction (the divisor) and then multiply the two fractions together:

(15/24) : (25/48) = (15/24) * (48/25)

Now, simplify the fractions before multiplying:

(15/24) = (15 ÷ 3) / (24 ÷ 3) = 5/8 (48/25) = (48 ÷ 1) / (25 ÷ 1) = 48/25

Now, multiply the simplified fractions:

(5/8) * (48/25) = (5 * 48) / (8 * 25) = 240 / 200

Finally, simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 40 in this case:

240/200 = (240 ÷ 40) / (200 ÷ 40) = 6/5

So, the final results are:

1. 6/7 - 4/7 = 2/7
2. 7/12 + 1/4 = 5/6
3. 7/21 * 9/14 = 3/14
4. 15/24 : 25/48 = 6/5