Integers

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# Integers - PowerPoint PPT Presentation

Integers. Add / Subtract Integers. Double Negatives. Multiply +ve / -ve Integers. www.mathsrevision.com. Divide by +ve or -ve Integers. Starter Questions. www.mathsrevision.com. Integers. Addition &amp; Subtraction. Learning Intention. Success Criteria.

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### Integers

Double Negatives

Multiply +ve / -ve Integers

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Divide by +ve or -ve Integers

Created by Mr. Lafferty Maths Dept.

### Starter Questions

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Created by Mr. Lafferty Maths Dept.

Integers

Learning Intention

Success Criteria

• To remember rules for adding and subtract both positive and negative numbers.
• 1. We are learning how to add positive and negative numbers .

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• 2. To apply rules to simple questions.

Created by Mr. Lafferty Maths Dept.

4

3

2

1

0

-1

-2

-3

Think

Thermometer

Integers

1 + 3 =

4

4 - 5 =

-1

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-3 + 5 =

2

-1 - 2 =

-3

Created by Mr. Lafferty Maths Dept.

Integers

Now try Exercise 3

Ch2 (page 14)

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### Starter Questions

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Created by Mr. Lafferty Maths Dept.

Integers

Learning Intention

Success Criteria

• To understand the ‘double negative’ rule for numbers.
• 1. We are learning how to work with the ‘double negative’ for numbers.
• 2. To simplify and solve problems using the ‘double negative’ property.

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Created by Mr. Lafferty Maths Dept.

Rule

“Double negative

make a positive”

- - = +

Integers

Double Negative

1 - (- 2) =

1 + 2 =

3

- 4 – (- 5) =

- 4 + 5 =

1

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-3 - (- 5) =

- 3 + 5 =

2

-1 - (- 10) =

-1 + 10 =

9

Created by Mr. Lafferty Maths Dept.

Integers

Now try Exercise 4

Ch2 (page 15)

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Created by Mr. Lafferty Maths Dept.

### Starter Questions

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Created by Mr. Lafferty Maths Dept.

Integers

Multiplication

Learning Intention

Success Criteria

1. Understand how to multiply positive and negative numbers.

• 1. We are learning how to multiply positive and negative numbers.

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Created by Mr. Lafferty Maths Dept.

With your partner can try and come up with the rules for multiplying integers

(+ve) x (+ve) = (+ve)

(-ve) x (–ve) = (+ve)

(-ve) x (+ve) = (-ve)

(+ve) x (–ve) = (-ve)

Integers

Multiplication

Multiplying Integers

2

1 x (-2) =

-2

(-2) x (-1) =

-20

(-4) x 5 =

(- 2) x (-5) =

10

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-9

(-3) x 3 =

25

(-5) x (-5) =

Same signs

Different signs

32

(-4) x (-8) =

-40

5 x (-8) =

Created by Mr. Lafferty Maths Dept.

Integers

Multiplication

Now try MIA Ex 13.1

Ch1 (page 24)

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### Starter Questions

20o

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xo

xo

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Integers

Division

Learning Intention

Success Criteria

• 1. We are learning how to divide by positive and negative numbers.

1. Understand how to divide positive and negative numbers.

1. Apply rules to simple number questions.

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Created by Mr. Lafferty Maths Dept.

Integers

MNU 2-04a

MNU 3-03b

MNU 3-04a

Division

Now try MIA Ex 14.1

Ch1 (page 25)

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With your partner can try and come up with the rules for multiplying integers

(+ve) ÷ (+ve) = (+ve)

(-ve) ÷ (–ve) = (+ve)

(-ve) ÷ (+ve) = (-ve)

(+ve) ÷ (–ve) = (-ve)

Integers

Division

(-2) ÷ 1 =

-2

(-2) ÷ (-1) =

2

4

20 ÷ (-5) =

-4

(- 20) ÷ (-5) =

Same signs

Different signs

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-3

(-9) ÷ (-3) =

(-9) ÷ 3 =

3

-5

5

(-25) ÷5 =

(-40) ÷ (-8) =

Created by Mr. Lafferty Maths Dept.

Integers

Division

Now try MIA Ex 14.1

Ch1 (page 25)

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Created by Mr. Lafferty Maths Dept.