Aisha changed 1.45 + 2.38 to 1.5 + 2.4 in order to estimate the sum. What estimation method did she use?

Aisha changed 1.45 to 1.5 and 2.38 to 2.4. Each number was rounded to one decimal place, or the nearest tenth, before adding. Therefore, she used rounding to the nearest tenth.

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