Ответ 0. Просто 3*2=6*6=36; 6*5=30. Последняя 0
Ответ:
У периметр квадрата формула такая: Р=4а
Р(красн кв)=8; а- сторона кв,
а=8:4 ; а=2
Р(син кв) =? а=3; Р=4а; Р(син)=4×3=12
Р=12-8=4см
На 4 см периметр синего квадрата больше красного
Пусть на 3м этаже Х залов ,тогда на втором 2 2/3х , а на первом х+120, составим уравнение
Х + 2 2/3Х +Х+120= 400
4 2/3Х = 400-120
Х =280 : 4 2/3
Х =280* 3/14
Х=60 залов на 3м этаже
60* 2 2/3 =60 * 8/3 =160 залов на втором этаже
60 + 120 =180 залов на 1м этаже
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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?
1) 84 2) 52 3) 99 4) 75 5) 15 6) 5 7) 16 8) 32 9) 10) 3