Integers www mathsrevision com Level 2 Integers in

Integers www. mathsrevision. com Level 2 Integers in Context Integers Using a Thermometer Adding & Subtracting Integers 05 -Nov-20 Created by Mr. Lafferty Maths Dept

www. mathsrevision. com Starter Questions 1. Solve 2. 9 + 6 h – 3 = 18 x 7 3. Show an example of an acute angle. 05 -Nov-20 Created by Mr. Lafferty Math Dept

Integers www. mathsrevision. com Level 2 Learning Intention 1 05 -Nov-20 Success Criteria We are learning how to use integers in context. 1. Understand how integers are used in real-life. Created by Mr. Lafferty Maths Dept

Integers www. mathsrevision. com Level 2 Definition : An INTEGER is a negative or positive whole number, including 0. e. g. -2, -1, 0, 5, 100 Note : -2. 5, -1. 2, 23. 5 Are NOT INTEGERS Write down 3 places where Integers are used Bank Weather 05 -Nov-20 Created by Mr. Lafferty Maths Dept Sea-Level Height

Write down the temperature indicated on thermometer. 44 o. F 7 o F -36 o. F 05 -Nov-20 Created by Mr. Lafferty Maths Dept -43 o. F

Context Questions A weather station predicted the temperature on Saturday would be 85°F. If the actual temperature was 11° colder than their prediction, what temperature was it? 85 – 11 = 74 o. F Sarah set thermostat in her house to 72°F, which was 16° cooler than the temperature outside. 72 + 16 = 88 o. F What temperature was it outside? Sarah bank account showed that she has £ 150. If she withdraws £ 210 from her account. What will her balance show up as now. 150 - 210 = -£ 60. 00 John balance shows -£ 70. He pays a bill of £ 80 with his debit card and then his pay of £ 240 was paid into his account. -70 – 80 What will his balance show up as now. 05 -Nov-20 Created by Mr. Lafferty Maths Dept + 240 = £ 90. 00

Integers www. mathsrevision. com Level 2 Now try TJ 2 b Ex 1 Ch 8 (page 81) 05 -Nov-20 Created by Mr. Lafferty Maths Department

www. mathsrevision. com Starter Questions 1. Solve y + 75 = 100 2. 8 - 10 3. Show an example of an obtuse angle. 05 -Nov-20 Created by Mr. Lafferty Math Dept

Integers Addition & Subtraction www. mathsrevision. com Level 2 Learning Intention 1 05 -Nov-20 Success Criteria We are learning how to write down mathematically addition and subtraction of integers. 1. To be able to write down mathematically the addition and subtraction of integers. Created by Mr. Lafferty Maths Dept

Negative Numbers Level 2 www. mathsrevision. com o o (a) 4 C up from 12 C 12 + 4 = 16 o o (b) 8 C down from 10 C 10 - 8 = 2 o o (c) 3 C up from -2 C -2 + 3 = 1 o o (d) 6 C down from 2 C 2 - 6 = -4 24 20 16 12 8 4 0 -4 -8 -12 -16 -20 -24 05 -Nov-20 Created by Mr. Lafferty Maths Dept 22 18 14 10 6 2 UP + -2 -6 -10 -14 -18 -22 Down -

Integers www. mathsrevision. com Level 2 Put these temperatures in order starting with coldest first. 17 o. C 05 -Nov-20 -3 o. C -15 o. C Created by Mr. Lafferty Maths Dept 0 o C 2 o C

Integers www. mathsrevision. com Level 2 On a cold winters night the temperature drops by 3 o. C every hour. The temperature is 1 o. C at 10 pm. (a) What is the temperature at 11 pm. -2 o. C (b) What is the temperature at 2 pm. -11 o. C 05 -Nov-20 Created by Mr. Lafferty Maths Dept

Integers www. mathsrevision. com Level 2 Now try TJ 2 b Ex 2 Ch 8 (page 83) 05 -Nov-20 Created by Mr. Lafferty Maths Department

Starter Questions www. mathsrevision. com Level 2 Q 1. Calculate Q 2. How many euros do I get for £ 10 if exchange rate is £ 1 1. 4 € Q 3. What is the time difference 09: 45 and 20: 30 Q 4. The answer to the question is 30. What is the question. 05 -Nov-20 Created by Mr. Lafferty Maths Dept

Integers Addition & Subtraction www. mathsrevision. com Level 2 Learning Intention 1. 05 -Nov-20 Success Criteria We are learning the ‘double negative’ rule for integers. 1. To understand the ‘double negative’ rule for integers. 2. To be able to solve problems using the ‘double negative’ rule. Created by Mr. Lafferty Maths Dept.

Rule Negative Numbers Adding a negative is the same as subtracting www. mathsrevision. com Level 2 (a) 12 + 4 = 16 Start at 12 (b) Go up 4 10 + (-8) = 2 Start at 10 (c) Go down 8 7 - 10 = -3 Start 05 -Nov-20 at 7 24 20 16 12 8 4 0 -4 -8 -12 -16 -20 -24 Go down 10 Created by Mr. Lafferty Maths Dept 22 18 14 10 6 2 UP + -2 -6 -10 -14 -18 -22 Down -

Integers Level 2 www. mathsrevision. com Examples (1) 3 -7 = -4 (2) 4 + (-9) = -5 (3) -7 - 8 = -15 (4) -2 + (-12) = -14 (5) -5 - 25 = -30 (6) (-8) + (-9) = -17 05 -Nov-20 Remember Rule ! Created by Mr. Lafferty Maths Dept

Integers Level 2 www. mathsrevision. com Examples (1) (-3) – 4 + 2 = -5 (2) 4 + 5 + (-9) + (-2) = -2 (3) -7 – 8 + (-3) + (-10) = -28 (4) -2 + 8 – 6 + (-7) = -7 (5) -5 – (25 – 10) = -20 (6) 05 -Nov-20 (-800) + (-900) + 400 Created by Mr. Lafferty Maths Dept = -1300

Have you updated your Learning Log ? Integers www. mathsrevision. com Level 2 Now try TJ 2 b Ex 3 Ch 8 (page 84) Are you on Target ? I can ? 05 -Nov-20 Are you on Target ? I can ? Created by Mr. Lafferty Maths Department