Addition and Subtraction

Addition and Subtraction

Interactive lesson

Let's see how much you've remembered of the last few weeks...

• Do you remember how to write questions using a column method?

• Can you use the borrowing method for subtraction?

• How do we work out the perimeter of a shape?

During today's lesson...

During this recap lesson some reminders will be shown and then you'll have a chance to complete some questions against your classmates,

Are you ready for your first question?

Multiple Choice

Is 4 + 5 = 10?

• Yes

• No

Multiple Choice

Is 10 - 8 = 2?

• Yes

• No

Column Method

When working with addition and subtraction, we should rewrite questions using the column method.

This means we need to make sure units, tens and hundreds stay in the correct column.

When we have decimals, we also have to make sure that the decimal points are underneath each other.

Are you ready for some questions?

Three questions coming up...

Multiple Choice

Is this correct?

Yes or No

• Yes

• No

Multiple Choice

What is 26 + 13=

• 29

• 49

• 39

• 36

• Non of the above

Multiple Choice

• 279

• 179

• 79

• 197

Perimeter

• Perimeter is the total distance around the outside of a 2D shape

• You MUST remember the units!

• Let's see if you can find these perimeters... (questions are coming)

Multiple Choice

Do you multiply or add when you find the perimeter?

• multiply

• add

Multiple Choice

What is the perimeter of the shaded figure?

• 28

• 24

• 22

• 26

Multiple Choice

Find the PERIMETER of this figure.

• 25 cm

• 20 cm

• 10 cm

• 20 sq. cm

Multiple Choice

What is the perimeter of the shape?

• 4 in.
• 10 in. 
• 12 in. 

Let's mix up the questions!

Perimeter, adding and subtracting questions all jumbled together.

Multiple Choice

What number is represented?

• 364

• 461

• 300604

• 13

Multiple Choice

What is the perimeter of this rectangle?

• 21 units

• 12 units

• 3 units

• None of the above.

Multiple Choice

17 + 6 =

• 20

• 22

• 23

Multiple Choice

If the perimeter of a triangle is 8, and it has sides of 3 and 4, what is the third side?

• 2
• 1
• 3
• ⁴

Multiple Choice

Which is the correct number sentence for this strip diagram.

• 8 + 2 =

• 8 - 2 =

Multiple Choice

What is the perimeter of the rectangle?

• 15 cm
• 16 cm
• 15 sq cm
• 15 cm

Multiple Choice

What is the perimeter?

• 4 in.
• 16 in. 
• 8 in. 

Multiple Choice

7.8 - 4.6 =

• 3.2

• 2.2

• 2.3

• 3.3

Multiple Choice

Solve.
3.9 + 2.2 = 

• 5.1
• 6.1
• 1.7
• 32.92

Multiple Choice

Find the perimeter of the irregular shape

• 28m

• 21m

• 30m

• 32m

Multiple Choice

76, 79, ______, _______, 88

• 82, 85

• 80, 83

• 81, 84

• 83, 86

Multiple Choice

The _____________ is the answer to a subtraction problem.

• addend
• product 
• sum 
• difference 

Multiple Choice

1,000 less than 43,896

• 43,996
• 43,796
• 44,896
• 42,896

Multiple Choice

Find the length of the missing side of the shape. The perimeter is 18 inches.

• 6 centimeters

• 9 inches

• 6 inches

• 12 centimeters