1-7/128-3/513 3/5-612-4 3/410 1/2-4 5/145 3/8-3 5/628 5/8+23 3/82 1/7+3 3/82 1/7+3 3/2+4 5/2112 7/12+3 8/9-4 4/4

Question

Sirf

Математика

3 ноября, 19:56

1-7/128-3/513 3/5-612-4 3/410 1/2-4 5/145 3/8-3 5/628 5/8+23 3/82 1/7+3 3/82 1/7+3 3/2+4 5/2112 7/12+3 8/9-4 4/4

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Владимир Матвеев · Answer 1

1. 1 - 7/12 = 12/12 - 7/12 = 5/12.

1 - это 12/12.

2. 8 - 3/5 = 40/5 - 3/5 = 37/5 = 7 2/5.

8 - это 7 5/5 = (7 * 5 + 5) / 5 = 40/5.

3. 13 3/5 - 6 = 68/5 - 30/5 = 38/5 = 7 3/5.

13 3/5 = (13 * 5 + 3) / 5 = 68/5.

6 - это 5 5/5 = (5 * 5 + 5) / 5 = 30/5.

4. 12 - 4 3/4 = 48/4 - 19/4 = 29/4 = 7 1/4.

12 - это 11 4/4 = (11 * 4 + 4) / 4 = 48/4.

4 3/4 = (4 * 4 + 3) / 4 = 19/4.

5. 10 1/2 - 4 5/14 = 21/2 - 61/14 = (147 - 61) / 14 = 86/14 = 6 1/7.

10 1/2 = (10 * 2 + 1) / 2 = 21/2.

4 5/14 = (4 * 14 + 5) / 14 = 61/14.

6. 5 3/8 - 3 5/6 = 43/8 - 23/6 = (129 - 92) / 24 = 37/24 = 1 13/24.

5 3/8 = (5 * 8 + 3) / 8 = 43/8.

3 5/6 = (3 * 6 + 5) / 6 = 23/6.

7. 28 5/8 + 23 3/8 = 229/8 + 187/8 = 416/8 = 52.

28 5/8 = (28 * 8 + 5) / 8 = 229/8.

23 3/8 = (23 * 8 + 3) / 8 = 187/8.

8. 2 1/7 + 3 3/8 = 15/7 + 27/8 = (120 + 189) / 56 = 309/56 = 5 29/56.

2 1/7 = (2 * 7 + 1) / 7 = 15/7.

3 3/8 = (3 * 8 + 3) / 8 = 27/8.

9. 2 1/7 + 3 3/2 + 4 5/21 =

2 1/7 = (2 * 7 + 1) / 7 = 15/7.

3 3/2 = (3 * 2 + 3) / 2 = 9/2.

4 5/21 = (4 * 21 + 5) / 21 = 89/21 = 4 5/21.

10. 12 7/12 + 3 8/9 - 4 4/4 = 151/12 + 35/9 - 20/4 = (453 + 140 - 180) / 36 = 413/36 = 11 17/36.

12 7/12 = (12 * 12 + 7) / 12 = 151/12.

3 8/9 = (3 * 9 + 8) / 9 = 35/9.

4 4/4 = (4 * 4 + 4) / 4 = 20/4.