Question

At 10:00 P.M. one winter night, the temperature was 3C-3^{\circ} \mathrm{C}. At midnight, the temperature was 7C-7^{\circ} \mathrm{C}. Use <, >, or = to compare the two temperatures and explain their relationship.

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We need to compare 3-3^\circ and 7-7^\circ.

To compare negative integers, we can compare their absolute values. The number with the larger absolute value is the smaller number. Since 7-7 has a larger absolute value than 3-3, then 3>7\boxed{-3^\circ>-7^\circ}.

Since 7-7^\circ is smaller than 3-3^\circ, then the temperature at midnight was colder\fbox{the temperature at midnight was colder} than the temperature at 10:00 P.M.

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