Unit 2 Addition, Subtraction, and Multiplication
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This document provides an overview of math lessons on whole numbers, including addition, subtraction, multiplication, and division. It includes examples of adding multiple numbers together using place value and regrouping. For subtraction, it demonstrates subtracting numbers with multiple digits using place value and regrouping ones as tens or hundreds when needed. Multiplication examples show setting up problems by multiplying each digit of one number by each digit of the other. Homework assignments are provided for additional practice.
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Unit 2 Addition, Subtraction, and Multiplication
- 1. Math 5: Whole Numbers Subtracting with 4-digit numbers and Multiplication and Division facts to 144
- 2. Addition DVD Player - $149 3D Television - $379 Ipod - $219 What are some different ways we could add the number?
- 3. Addition – Show me Base Ten Blocks Add two numbers then another How can you tell if your answer is reasonable? (Estimate)
- 4. 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.
- 5. 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.
- 6. Subtraction Subtract the ones Subtract the tens Subtract the hundreds To subtract the thousands, regroup 1 ten thousand as 10 thousands.
- 7. Check To check if you answer is correct: Total + Second Number = The top number
- 8. Multiplication 197 x 68. How do we set this up?
- 10. Multiplication
- 11. Multiplication Add ZERO!!! Because you are now actually multiplying by 60!
- 12. Multiplication
- 13. Multiplication All done! Just add the numbers together to get your answer 13396
- 14. In Class work . 62 #1, 2 abc, 7, 10 and pg. 66 #1, 3, 5.