Question

Найдите произверение или частное а) 9/10*5/12 б) 3/9:11/5 в) 21/22*2/5 г) 7/8:7/16 д) 1(НЕ 13) 3/5 * 2(НЕ 21) 1/2 е) 1(НЕ 13) 3/4:10 (НЕ 101)1/2 напишите разборчиво пж

Answer 1

Д и е, не поняла тебя))

Answer 2

а) 9/10 * 5/12: To multiply fractions, you multiply the numerators (top numbers) together and the denominators (bottom numbers) together. So, for 9/10 * 5/12, the calculation would be (9 * 5) / (10 * 12) = 45/120. However, this fraction can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 15. Simplifying, we get 3/8.

б) 3/9 : 11/5: To divide fractions, you multiply the first fraction by the reciprocal of the second fraction. So, for 3/9 : 11/5, the calculation would be (3/9) * (5/11). Multiplying the numerators and denominators, we get (3 * 5) / (9 * 11) = 15/99. This fraction can also be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 3. Simplifying, we get 5/33.

в) 21/22 * 2/5: Multiplying fractions follows the same rule as in the first example. So, for 21/22 * 2/5, the calculation would be (21 * 2) / (22 * 5) = 42/110. This fraction can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 2. Simplifying, we get 21/55.

г) 7/8 : 7/16: To divide fractions, we multiply the first fraction by the reciprocal of the second fraction. So, for 7/8 : 7/16, the calculation would be (7/8) * (16/7). Multiplying the numerators and denominators, we get (7 * 16) / (8 * 7) = 112/56. This fraction can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 56. Simplifying, we get 2/1, which is equivalent to 2.

д) 1(НЕ 13) 3/5 * 2(НЕ 21) 1/2: To multiply mixed numbers, we first convert them to improper fractions. For 1(НЕ 13) 3/5, the improper fraction would be (1 * 5 + 3) / 5 = 8/5. For 2(НЕ 21) 1/2, the improper fraction would be (2 * 2 + 1) / 2 = 5/2. Now, we can multiply the fractions: (8/5) * (5/2). Multiplying the numerators and denominators, we get (8 * 5) / (5 * 2) = 40/10. This fraction can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 10. Simplifying, we get 4/1, which is equivalent to 4.

е) 1(НЕ 13) 3/4 : 10(НЕ 101) 1/2: To divide mixed numbers, we first convert them to improper fractions. For 1(НЕ 13) 3/4, the improper fraction would be (1 * 4 + 3) / 4 = 7/4. For 10(НЕ 101) 1/2, the improper fraction would be (10 * 2 + 1) / 2 = 21/2. Now, we can divide the fractions: (7/4) : (21/2). To divide fractions, we multiply the first fraction by the reciprocal of the second fraction. So, the calculation would be (7/4) * (2/21). Multiplying the numerators and denominators, we get (7 * 2) / (4 * 21) = 14/84. This fraction can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 14. Simplifying, we get 1/6.

I hope this helps! Let me know if you have any further questions.