Divide an Odd Whole Number Mixed Fraction by Two
At 0:28 in
This Makes Fractions Stupid Easy
What happens here
The next scenario addresses finding half of a mixed number with an odd whole number, using '19 3/8' as an example. To simplify, the whole number '19' is first 'bumped down' to '18'. This '18' is then divided by '2', yielding '9'. To handle the remaining part from the odd whole number, the original numerator '3' and the original denominator '8' are added together, resulting in a new numerator '11'. The original denominator '8' is again multiplied by '2' to get a new denominator '16'. Combining these steps, half of '19 3/8' is '9 11/16'. The process of bumping down the whole number by one and incorporating that value into the fraction by adding the numerator and denominator is key here.
Goal: Find half of a mixed number where the whole number is odd.
Tools and materials
- Marker — Writing down the numbers and calculations on the whiteboard
- Whiteboard Unbranded — Visual demonstration of the calculation steps
- Mixed Number — The fraction being divided
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What they say
(389 characters)Auto-generated from the video audio.