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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