Упр.8 Appendix 1 Математика ГДЗ Enjoy English 10 класс

Приведем выдержку из задания из учебника Биболетова, Бабушис 10 класс, Дрофа: 8 Mark the following statements as true or false. — If a number ends in five or zero, it’s always divisible by five. — If a number ends in three or nine, it’s divisible by three. — The cube root of nine is three. — The value of a square root can be both positive and negative. — The value of a fraction doesn’t change if we divide both the top and the bottom by one and the same number.

*Цитирирование части задания со ссылкой на учебник производится исключительно в учебных целях для лучшего понимания разбора решения задания.

Ответ

1. True — if a number ends in 5 or 0, it is divisible by 5.
2. False — a number is divisible by 3 if the sum of its digits is divisible by 3.
3. False — the cube root of 9 is not 3.
4. False — a square root has two values only in some contexts, but usually its principal value is positive.
5. True — the value of a fraction does not change if we divide both the numerator and the denominator by the same number.