## Integers Exercise

Do this exercise without using a calculator 1. Calculate:

 a. -2 + 4 b. -5 + -19 c. 4 − 2 d. 8 + - 5 e. 4 + -2 + -2 f. -8 + 4 g. -4 + -2 h. -100 − 120 i. -8 − 4 j. -2 − -4 k. 5 − -2 + 3 l. -4 − 4 − 4 m. 14 + -4 n. 4 + (-3 + 2) o. -4 − 2 + 4 p. -4 − -4 q. 0 − 3 + -2 r. 2 − (-4 + 5)

2. Calculate:

 a. -2 × 4 b. -5 × -2 c. 4 × -2 d. -8 × -5 e. 4 × -4 × -4 f. -8 × 4 × -2 g. -4 ÷ 2 h. -12 ÷ -6 i. -16 ÷ 4 j. -2 × -4 + 3 k. (-4)2 × 4 l. (-4)4 × 4 m. 14 ÷ -2 × 2 n. (-3)3  × 2 +1 o. -4 × -2 × 4 p. -4 ÷ -4 × -1 q.12 − -4 × 3 + -1 r. 2 − -4 × 6 + -2

3. Evaluate, if a = − 2 and b = 4:

a.  2b ÷ 4

b. 2b3

c. -4ab

d. 3a2

e. a2 − b2

f. (a + b)3 − (a − b)2

4. a. I start off with \$230 in the bank and then buy a fridge for \$145, a walkman for \$135 and a chair for \$45.60.

Luckily my bank manager allows me an overdraft. What is the balance of my account?

b. The temperature at Heathrow airport in London in January is 4°C at 10 pm. In the next 8 hours, the temperature falls 6 degrees.

What is the temperature at 6 am on the next morning?