Ответ учителя по предмету Математика
а) (1/4 + 2/3 — 1/2) / (1/2 — 1/4 + 2/3) = 5/11
1) 1/4 + 2/3 — 1/2 = 3/12 + 8/12 — 6/12 = 5/12
2) 1/2 — 1/4 + 2/3 = 6/12 — 3/12 + 8/12 = 11/12
3) 5/12 : 11/12 = 5/12 * 12/11 = 5/11
b) (3/5 — 1/3 — 2/9) / (7/15 + 2/3 — 4/5) = 2/15
1) 27/45 — 15/45 — 10/45 = 2/45
2) 7/15 + 2/3 — 4/5 = 7/15 + 10/15 — 12/15 = 5/15 = 1/3
3) 2/45 : 1/3 = 2/45 * 3 = 6/45 = 2/15
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Many philosophers said wise things about heath — how important it is for each person, and that one lost, it can’t be restored. If a person is eating bad food, smoking or taking alcohol — this ruins his health, and it’s very good if he has time to stop and think.
In fact, health is something that is given to many of us since birth. But only active life and good nutrition can help us stay healthy as long as possible.
The first aspect of good health is a healthy diet. Food that you eat gives you energy, vitamins and fibre. And if it is junk food — it gives you extra weight and problems with your health.
The second aspect of good health is sport and exercises. Doctors recommend to use the stairs instead of taking a lift, and to walk during the break at school and college but not to sit at the same place. There are workers who have to sit at the working table for hours, but then they have problems with their kidneys, which is very serious.
What are other contributions to good health? Of course, it’s the absence of bad habits. But it’s also your attitude to life. If you are full of energy, optimism and kind-heartedness, your life will be good. But if you are always angry, if it’s difficult for you to keep your temper — then the problems are on the threshold.
Finally, everything depends on us. Lifestyle it a way that leads to a happy and healthy life or to medical problems.The most important thing is to have a map that shows us the right way.