Rational Numbers

1.2.2a Fractions 1. Positive fractions are  fractions with the positive sign (+), and their values are greater than 0. 2. Negative fractions are  fractions with the negative sign (–), and their values are less than 0. 1.2.2b Decimals 1. There are positive decimals and negative decimals. 2. Positive decimals are greater than zero and negative decimals are less than … Read more

1.2.1 Basic Arithmetic Operations Involving Integers 1.2.1a Multiplication and Division of Integers 1. Multiplication and division of like signs gives (+) ( + ) × ( + ) = + ( + ) ÷ ( + ) = + ( − ) × ( − ) = + ( − ) ÷ ( − ) … Read more

Question 1: Evaluate 5 + (–7)    Solution: Therefore, 5 + (–7) = 5 – 7 = –2 Question 2: Evaluate –6 – (–5)    Solution: Therefore, –6 – (–5) = –6 + 5    = –1 Question 3: Simplify –3 + 7 + (–2)   Solution: Therefore, –3 + 7 + (–2) = 4 … Read more

1.1.1 Addition and Subtraction of Integers 1.1.1a Addition of Integers 1. Addition of integers can be done on a number line. (a) To add a positive integer: Move to the right (positive direction) on the number line. (b) To add a negative integer: Move to the left (negative direction) on the number line. 2. Integers … Read more