SJ 7.6 lesson
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•
Mathematics
•
5th Grade
•
Hard
Isabel Choe
Used 1+ times
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12 Slides • 0 Questions
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SJ 7.6 lesson
Common fractions: Subtracting mixed numbers with unrelated denominators (decomposing whole numbers)
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Questions
What do you know about the total length of these two jumps?
How would you estimate the difference?
How can we calculate the difference?
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Answer
The total length of the gray jump is more than 2 but less than 3.
The total length of the blue line is more than 4 but less than 5.
We can estimate that the difference will be more than 2 but less than 3.
We can calculate the difference by finding the lease common multiple of 3 and 4 to make the denominators the same.
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Question
Could we use one of these number lines to calculate the difference or do we need a new one?
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Answer
We need a new one.
How many equal parts do we need in the new number line?
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Directions - math notebook
Draw this number line in your math notebook and solve 4 1/4 - 2 2/3 = ?.
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Answer
1 7/12
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Answer
1 7/12
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Answer
1 11/15
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SJ 7.6 lesson
Common fractions: Subtracting mixed numbers with unrelated denominators (decomposing whole numbers)
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