Lesson 2.1 How do you compare positive and negative numbers? Graph numbers on a number line so you can compare them and order them from least to greatest.

Lesson 2.2 How do you add positive and negative numbers? If the signs are the same keep the sign and add the numbers. If the signs are different subtract the smaller number from the bigger number and take the sign of the bigger number.

Lesson 2.3 How do you subtract real numbers? To subtract two numbers, add the opposite of the second number to the first number.

Lesson 2.4 How do you multiply real numbers? If the signs of two numbers are the same, then the product is positive. If the signs of two numbers are different, then the product is negative.

Lesson 2.5 How do you use the distributive property to simplify expressions? Use the distributive property to write equivalent expressions without parentheses. Then combine like terms to simplify expressions.

Lesson 2.6 How do you divide real numbers? If two numbers have the same sign, then the quotient is positive. If two numbers have different signs, then the quotient is negative.

Lesson 2.7 How do you evaluate a square root? To evaluate a square root of a, you need to find the number b such that 𝑏 2 =𝑎. How do you compare real numbers? To compare real numbers, you can graph the numbers on a number line using approximations for square roots.