What is the answer for 56 - 10?
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
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.
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
Draw / write: What strategies can you use to add and subtract 0-1000?
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?
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?
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
Drawings (Base 10 Blocks) Touch Math With your fingers
How did you use drawings, concrete models, and symbols to help you add and subtract?