Substitution

Substitution

Y8 Miss Hancock

Today we are going to look at substituting (replacing) If you already know the answer to these questions enter them on the next slide...

Fill in the Blanks

The answer to question 2a)

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The answer to question 2b)

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HELP I DON'T KNOW!

Don't worry, if you need some reminders (especially about the rules on negative numbers) please take your time to look through the examples on the videos on the next few slides.

Video 1: Adding Subtracting negatives

Video 2: Multiplying negatives

Video 3: Substitution

Remember I am tracking your percentage so please do watch the videos to show me you understand when answering the questions.

Multiple Choice

What is 3 more than -4

• 0

• 1

• -1

Multiple Choice

What is 7 less than 5

• 12

• 2

• -2

Multiple Choice

3 + (-5)

• -2

• 2

• 8

• -8

Multiple Choice

3 + (-9)

• -6

• 6

• 12

• -12

Multiple Choice

7 - (-3) =

• 10

• -10

• 4

• -4

Multiple Choice

Which number is closest to 0 on a number line?

• -10

• -14

• -15

Multiple Choice

-9 x -9=

• 0

• 16

• -81

• 81

Multiple Choice

60 divided by -2

• 30

• 15

• -30

• -120

Multiple Choice

5 x -3

• -15

• 15

• -10

• 20

Multiple Choice

-5 ÷ -5

• 1

• 0

• -1

• 5

Multiple Choice

If  $$g=-9$$ , find  $$g+11$$  

• $$2$$  

• $$-2$$  

• $$20$$  

• $$-20$$  

Multiple Choice

If $$f=-4$$ , find  $$3f$$  

• $$12$$  

• $$-12$$  

• $$34$$  

• $$-34$$  

Multiple Choice

Work out the value of the following expressions when a = 3, b = 4 and c = 5.

a + b

• 7

• 8

• 9

• 6

Multiple Choice

Work out the value of the following expressions when a = 3, b = 4 and c = 5.

a + b

• 7

• 8

• 9

• 6

Multiple Choice

If  $$h=7$$  , find  $$h^2$$  

• 14

• 49

• 72

• 36

Multiple Choice

If $$b=10$$ , find  $$\frac{40}{b}$$  .

• 10

• 2

• 30

• 4

Multiple Choice

If $$a=3$$ , find  $$7-a$$  

• 2

• 3

• 4

• 5

Multiple Choice

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
3ab

• 10
• 12
• 15
• 36

Multiple Choice

If $$j=4$$ , find  $$2j+3$$  

• 27

• 11

• 12

• 9

Got the basics?

Please reattempt the quizizz if below 75%!

Let's now practice on Mathspad some harder questions! 'Substitution 1'

Please be working them out in your book.

REMEMBER BIDMAS! Indices before multiplication is important