- (5 min) Mental Math
- Start with 55, add 8, then divide by 7 [9]
- What is 60% of 80? [48]
- What is 50 times 200? [10,000]
- What is 8000 times 20? [160,000]
- What is 30% of 50? [15]
- What is 400 times 30? [12,000]

- (5 min) Review of homework #20 (<= 3 problems)

**(15 min) Review course concepts:**

- Discuss area and perimeter. Have students find the area
of these shapes (and the perimeter of the first):
A = 402 cm ^{2}

P = 98 cmA = 60 mi ^{2} - Pass out the "Math Concepts Review" handout and discuss triangle types.
- Discuss angle rules using the handout. If you have time, use the
following examples:
? = 57 ^{o}? = 40 ^{o}? = 125 ^{o} - Draw this number line on the board:

|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8

Ask the students:What is - 5 + 8? [+ 3] What is - 4 - 3? [- 7] What is 5 - 8? [ - 3] - Use the handout to discuss multiplying and dividing signed numbers.
Use these examples:
- 6 x - 5 = ? [ + 30] - 6 x + 5 = ? [ - 30] - ( - 5) = ? [ + 5] + ( - 5) = ? [ - 5] - Discuss expression evaluation.

Use these examples for a = 3, b = 2, c = 9:abc [= 54] bc/a [ = 6] b ( a - c) [ = -18] - Discuss equation solution using these examples:
3x - 5 = 22 [x = 9] x/8 = 8 [x = 64] x ^{2}- 5 = 76 [x = 9] **Discuss word phrases using the handout. If you have time, have them solve this problem:**If I take three times my age and subtract 18 I get 21. How old am I? [13 years old]**Discuss mean, mode median and range using only the examples in the handout.****Discuss probability using the handout examples.**

**Discuss the circumference and area of a circle using the handout.**

If time permits, have them find the area and perimeter of this half circle:

- Discuss area and perimeter. Have students find the area
of these shapes (and the perimeter of the first):
**(Remainder of class) In-class Exercise.**

**Hand out homework as students successfully complete the in-class exercise.**