Children with ADHD (attention deficit hyperactivity disorder) can be hyperactive which can make it difficult to get to sleep. Bedtime can also be chaotic and stressful for parents.
Rational Numbers 5/1, 1/2, 1.75, -97/3 ... A rational number is any number that can be written as a ratio of two integers (hence the name!). In other words, a number is rational if we can write it as a fraction where the numerator and denominator are both integers.
This is another use for fractions apart from numbers we need for measuring: Multiplication by a fraction signifies a part of the multiplicand. And so the symbolic statement, 4 = Â½ Ã 8, expresses the ratio of 4 to 8: 4 is one half of 8.. For the most general definition of multiplication, see Section 3.