Maths 041020

Maths 04.10.20

WALT: Add and subtract multiples of 100

Success Criteria:

I will be successful if I can:

. add and subtract whole numbers mentally

. explain what a multiple is

. add multiples of 100

. subtract multiples of 100

Warm Up

To warm up our brains, we will begin with a quick addition game on Manga High.

Who will get the highest score?

Good luck!

Can you write down all the multiples of 100?

I will freeze my board whilst you answer the question on the next slide.

Open Ended

Can you write down all the multiples of 100 from the previous slide?

What does multiple mean?

How do you know if the numbers are multiples of 100?

You have 3 minutes!

How do we add or subtract multiples of 100?

Watch the video:

https://www.youtube.

com/watch?v=PmsJkhps7gE

Multiple Choice

Which digit changed when we added or subtracted 100?

• Ones

• Tens

• Hundreds

• Nothing changed

Fill in the Blanks

What is 134 + 100?

Fill in the Blanks

What is 100 + 504?

Fill in the Blanks

What is 873 - 100?

Fill in the Blanks

What is 504 - 100?

Fill in the Blanks

How about 908 + 100?

What was different about the last question?

908 + 100 = ?

Share your answers.

Fill in the Blanks

How about 1004 - 100?

What was different about the last question?

1004 - 100 = ?

Share your answers.

True or false?

Answer the question on the next slide.

Multiple Choice

True or false?

• True

• False

Who is correct? Why?

Answer the question on the next slide!

Multiple Choice

Who is correct?

• Jane

• Sarah

Task time

We will now play a class Quizziz to see how amazing you are at adding and subtracting 100.

Who will be the class genius?

Good luck!