Subtracting mixed numbers in 4th grade involves working with both the whole number and fractional parts. Here's a breakdown of the process, drawing from the video reference about adding and subtracting mixed numbers:
Understanding Mixed Numbers
Before subtracting, it’s important to understand what mixed numbers are. A mixed number is a combination of a whole number and a fraction, such as 2 1/2.
Steps for Subtracting Mixed Numbers
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Separate the Whole Numbers and Fractions: Begin by separating the whole number parts and the fractional parts of the mixed numbers. For example, if you're subtracting 1 1/5 from 2 4/5, you would consider the whole numbers (2 and 1) separately from the fractions (4/5 and 1/5).
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Subtract the Fractions: Subtract the fractions. It is important that the fractions have the same denominator to perform the subtraction. In the example above, 4/5 - 1/5 = 3/5.
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Subtract the Whole Numbers: Next, subtract the whole numbers. In the example from above: 2 - 1 = 1.
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Combine the Results: Finally, combine the whole number difference and the fraction difference to create your new mixed number. In our example, the answer is 1 3/5.
Example From the Reference
In the video referenced, there is an example of subtracting mixed numbers. In this example, the narrator subtracted 1 1/5 from 2 4/5.
- The whole numbers 2 and 1 were subtracted to equal 1.
- The fractions 4/5 and 1/5 were subtracted to equal 3/5.
- The final answer was 1 3/5.
Key Points
- Same Denominator: Make sure the fractions have the same denominator before subtracting. If they don't, you may need to find a common denominator.
- Borrowing: If the fraction you are subtracting from is smaller, you might need to "borrow" from the whole number (this concept may be introduced after 4th grade but is not in the reference provided).
By following these steps, 4th graders can successfully subtract mixed numbers. Remember to keep the whole numbers and fractions separate and handle them with care.
