Understand the tenth part of a unit and how to add/subtract measurements represented as fractions out of 10.
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Explaining the division of a unit length into 10 equal parts.
When exact measures are required, we can divide a unit length into equal parts. Each smaller part represents one-tenth () of a unit.
Rule for writing and reading tenths.
Visual scales demonstrating how a 1 cm gap is split into 10 smaller intervals.
A pencil's length measured to exactly 3 units and 4 one-tenths.
Sonu's arm measurement addition example.
Sonu is measuring his arm. His lower arm measures units, and his upper arm measures units. What is the total length of his arm?
Shylaja's finger measurement subtraction.
The length of Shylaja’s hand is units, and her palm is units. To find the length of her middle finger, we must subtract the palm from the total hand length. We cannot remove one-tenths from one-tenths, so we split a unit from to get one-tenths. The hand length now becomes units and one-tenths. Now, we subtract the whole units: . Next, we subtract the fractional parts: one-tenths minus one-tenths equals one-tenths. This gives a final finger length of units.
MCQ testing the addition of fractional parts.
If the length of a honeybee's thorax is units and its abdomen is units, what is the combined length?
Structured solver for adding mixed fraction tenths.
Evaluate the sum:
Identify the numbers to be added.
Combine the tenths together. Do not add the denominators.
Split the new fraction into whole units and remaining tenths.
Add any newly created whole units to the original whole units.
Write the final simplified mixed number.