Pick 2 numbers on the number line like 4 and 8. Now add them together and divide that sum by 2: (4 + 8)/2 = 6 (which is the midpoint between 4 and 8). Now subtract 4 from 8 and divide by 2. What do you get? Do it again with the 2 numbers 8 and 10. As you can see there is no recognizable pattern when you subtract, but there is when you add.
you make things look so simple, good teacher!
Professor upload astronomy rest lectures
We are working on a new set.
What would subtracting the two x variables divided by 2 (instead of adding as you demonstrated in the video) give you?
Pick 2 numbers on the number line like 4 and 8. Now add them together and divide that sum by 2: (4 + 8)/2 = 6 (which is the midpoint between 4 and 8). Now subtract 4 from 8 and divide by 2. What do you get? Do it again with the 2 numbers 8 and 10. As you can see there is no recognizable pattern when you subtract, but there is when you add.
Proof: middle = A + (B - A)/2 = (A + B) /2