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.
The sum of two or more negative integers is a negative integer. Example: (+7) + (+ 4) = + 11. (â 8) + (â 9) = â 17. Rule 2 : To find the sum of a positive and a negative integer: Subtract the two numbers (ignore the signs) and then keep the sign of the larger integer.