Задание 157 Вариант 3 Самостоятельная работа ГДЗ Дидактические материалы Чесноков 5 класс (Математика)
1 га = 100 а = 10 000 м2; 1 км2 = 100 га.
а) $$15\ \text{га} = 15 \cdot 10\,000\ \text{м}^2 = 150\,000\ \text{м}^2;$$
$$7\ \text{га}\ 3\,000\ \text{м}^2 = 7 \cdot 10\,000\ \text{м}^2 + 3\,000\ \text{м}^2 = 70\,000\ \text{м}^2 + 3\,000\ \text{м}^2 = 73\,000\ \text{м}^2;$$
$$22\ \text{га} = 22 \cdot 10\,000\ \text{м}^2 = 220\,000\ \text{м}^2.$$
б) $$24\ \text{га} = 24 \cdot 100\ \text{а} = 2\,400\ \text{а};$$
$$13\ \text{га}\ 5\ \text{а} = 13 \cdot 100\ \text{а} + 5\ \text{а} = 1\,300\ \text{а} + 5\ \text{а} = 1\,305\ \text{а};$$
$$25\,000\ \text{м}^2 = 25\,000 : 100\ \text{а} = 250\ \text{а}.$$
в) $$14\,500\,000\ \text{м}^2 = 14\,500\,000 : 10\,000\ \text{га} = 1\,450\ \text{га};$$
$$3\,700\ \text{а} = 3\,700 : 100\ \text{га} = 37\ \text{га};$$
$$2\ \text{км}^2 = 2 \cdot 100\ \text{га} = 200\ \text{га}.$$
г) $$2\,370\ \text{а} = 2\,300\ \text{а} + 70\ \text{а} = 23\ \text{га}\ 70\ \text{а};$$
$$540\,800\ \text{м}^2 = 540\,000\ \text{м}^2 + 800\ \text{м}^2 = 54\ \text{га}\ 8\ \text{а}.$$
