15:4=3,75 -1 кирпич
3,75х8=30 кг-8 кирпичей
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1. Математическое выражение, стоящее под
знаком обыкновенной дроби.
2. Как на Руси называли дроби?
3. Кто впервые в Европе ввёл десятичные
дроби?
4. Математическое выражение, стоящее над
знаком обыкновенной дроби.
5. Формат дроби.
6. В какой стране впервые
встречаются десятичные дроби?
7. Как называется эта дробь 9/8
?
8. Формат дроби.
9. Греческий математик, который
ввёл слова «числитель» и «знаменатель» в оборот?
10. Число, состоящее из одной или
несколько частей (долей) единицы?
<span>тимофеевка = 3/10 * 6 = 1,8 га </span>
<span>костр = 1,8 / 2 = 0,9 га </span>
<span>клевер = 0,9 + 1,2 = 2,1 га </span>
<span>пырей = 6 - 1,8 - 0,9 - 2,1 = 1,2 га </span>
<span>доля в общей площади 1,2 / 6 = 1/5 </span>
<span>Ответ. 1,2 га или 120 а; 1/5 поля </span>
так наверно...
40 / 8 = 5 (руб)-стоит газета
"/"-знак разделить
