**1. Quiz on negative number, addition and subtraction of integers**

**2. Multiplication, division and combined operations of integers:**.

- If two numbers have the same sign, their product/quotient is positive
- If two numbers have opposite signs, their product/quotient is negative
- Any integer multiplies 0, the product is 0: a x 0 = 0
- 0/a = 0, given a !=0
- a/0 is undefined
- How about 0/0? https://www.khanacademy.org/math/algebra/introduction-to-algebra/division-by-zero/v/undefined-and-indeterminate
- Combined operation: PEMDAS

**3. Rational numbers: **rational numbers are numbers that can be expressed in the form of a/b, where a and b are integers, and b != 0

**4. Addition, subtraction, multiplication and division of rational numbers**

**5. Home Work:**

- Handout: three pages
- Workbook:
- page 8: 6, 8, 9, 10, 11
- page 10: 18, 19, 20, 21, 22, 23