2.NSBT.2 and 2.NSBT.7 subtraction
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Count by tens and hundreds to 1,000 starting with any number. Add and subtract through 999 using concrete models, drawings, and symbols which convey strategies connected to place value understanding.
jillianbechtel
Updated 5 months ago
1. Drawings
180 seconds
What is the answer for 56 - 10?
2. Slide
60 seconds
Adding two numbers together to find a sum. Subtracting one number from another to find the difference. Practicing with numbers between 0 and 1000.
Adding and Subtracting 0-1000
3. Slide
60 seconds
Addition: The process of combining two or more numbers together to find a sum. Subtraction: The process of taking one number away from another to find the difference. 0-1000: The range of numbers between 0 and 1000.
Concepts:
4. Poll
60 seconds
What is the best way to add and subtract numbers from 0 to 1000?
- Using your fingers
- Memorizing the answers
- Using a number line
- Use base 10 blocks
5. Drawings
270 seconds
Draw / write: What strategies can you use to add and subtract 0-1000?
6. Slide
20 seconds
What if you have a number plus 10? Do you need to think about the ones place? Rewrite the problem if you need! 30-10=_____ 56-10=_____ 43-10=_____ 77-10=_____
Draw / write: How can we use place value understanding to help us add and subtract numbers?
7. Slide
60 seconds
456-100=____ 888+100=____ 101-100=____ 594+100=____
What if you add 100 to a number do we worry about the tens or ones place?
8. Poll
10 seconds
How can you use counting by tens and hundreds to help you add and subtract?
- Only look at the 10's or 100's place
- Worry about all the numbers
9. Slide
180 seconds
Drawings (Base 10 Blocks) Touch Math With your fingers
How did you use drawings, concrete models, and symbols to help you add and subtract?
10. Drawings
120 seconds
What is 59-10?
11. Drawings
120 seconds
77-10=___
12. Drawings
120 seconds
367-10=___
13. Drawings
120 seconds
13-10=___
14. Drawings
360 seconds
What is 123-100?
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