LESS THAN
Example:
100 marbles are needed to make a box full.
Question: Estimate the number of marbles when some of the marbles are taken out half from the box.
Answer: The estimation of the number of marbles in the box is 50 marbles, which is less than 100 marbles.
MORE THAN
Half of a pond has 100 fish.
Question: Estimate the number of fish to make the pond full.
Answer: The number of fish is more than 100 to make the pond full.
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