Unit 2 Addition, Subtraction, and Multiplication

Math 5: Whole Numbers

Subtracting with 4-digit numbers and Multiplication and Division facts to 144

Addition

DVD Player - $149

3D Television - $379

Ipod - $219

What are some different ways we could add the number?

Addition – Show me

Base Ten Blocks

Add two numbers then another

How can you tell if your answer is reasonable? (Estimate)

Add using place values

DVD Player - $149

3D Television - $379

Ipod - $219

Add the ones: 149 And regroup in the tens

379

+219

Then add the tens and regroup in the hundreds

Then add the hundreds.

Subtraction Maha’s had 10 800 seconds to complete a run. She ran for 9586

seconds. How much longer does Maha have?

10 800 – 9586

Use Place Value to Subtract.

10 800

- 9 586

……….

You cannot take 6 from 0 ones. There are no tens to regroup. Regroup 8 as 7 hundreds 10 tens.

Regroup 10 as tess as 9 tens 10 tens.

Subtraction

Subtract the ones

Subtract the tens

Subtract the hundreds

To subtract the thousands, regroup 1 ten thousand as 10 thousands.

Check

To check if you answer is correct:

Total

+ Second Number

= The top number

Multiplication

197 x 68. How do we set this up?

Multiplication

Multiplication

Multiplication

Add ZERO!!! Because you are now actually multiplying by 60!

Multiplication

Multiplication

All done! Just add the numbers together to get your answer

13396

In Class work

. 62 #1, 2 abc, 7, 10 and pg. 66 #1, 3, 5.

Homework

pg. 26-28