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Fractions (Difficulty: Medium)
A durable-learning AI tutor helps students build strong understanding they can use to solve new problem or transfer learning to solve similar problem in real world.
A pizza was cut into 8 equal slices. Tom ate 3 slices and Jane ate 2 slices.
What fraction of the pizza is left?
Before choosing an answer, explain how you would find the fraction left.
Choose your answer: Next check the Explanation and AI Feedback
Hint:
Add the slices eaten (3 + 2) and subtract from 8 total.
Explanation:
Tom ate 3 slices and Jane ate 2 slices.
Total eaten = 5 slices.
8 − 5 = 3 slices left.
Fraction left = 3/8.
AI Feedback + Sam Ortega (human expert checking) making sure no hallucination.
Total eaten = 5 slices.
8 − 5 = 3 slices left.
Fraction left = 3/8.
If student chose 3/8: Correct answer.
Correct → you added the eaten slices and subtracted from 8.
If student chose 1/2: Wrong answer.
4 slices would need to be left, but only 3 remain.
If student chose 2/8: Wrong answer.
You counted only two parts of the leftover slices.
If student chose 5/8: Wrong answer.
That is the amount eaten, not the amount left.
Sketch
Reflection:
Did adding the eaten slices first help you understand the fraction left?