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Stesso

Second Problem Setup and Solution (Simpler Case)

1:07
1:54
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At 1:07 in

Subtracting fractions aint gotta be hard!

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What happens here

The presenter clears the whiteboard and presents a second, simpler example: 11 and 3/4 minus 3 and 3/8. He quickly identifies that 4 needs to be multiplied by 2 to get the common denominator of 8. This converts 3/4 to 6/8. The problem is rewritten as 11 and 6/8 minus 3 and 3/8. Since 6 (numerator) is greater than 3, no borrowing is needed. He directly subtracts the whole numbers (11 minus 3 equals 8) and the fractions (6/8 minus 3/8 equals 3/8). The final answer is 8 and 3/8.

Goal: Solve a simpler mixed fraction subtraction problem

Tools and materials

  • Whiteboard Marker — Writing on the whiteboard
  • Whiteboard US General — Writing down the math problems and explanations

What they say

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That's it. Easy day. Let's run it back, something a little easier. Erase. All right, this one might be easier. Let's run it. So, you got 11 and 3/4 - 3 and 3/8, right? So, we know we got to change this one to an 8 cuz you got to have the same denominators before you even do anything. So, let's just run it. Multiply by 2 again. So, this is 6 8, right? So, we have 11 and 6/8 - 3 and 3/8. Worry about the whole numbers, right? 11 - 3 8. Easy day. 6 3 3. Keep your denominator, 8. Boom. Done. Easy. It's all you got to worry about right there. Follow for more.

Auto-generated from the video audio.