"Difference" means there are two numbers, and if you miss that clue, then the next word, "between", should alert you to the fact that two numbers are required. The difference between one number is a lot like one scissor, one tweezer, one pant, and the sound of one hand clapping.
To determine the difference between 12.34 and another number, subtract the other number from 12.34. Round the result to the nearest tenth using standard rounding rules. For example, with the other number as 10.56, the rounded difference is 1.8.
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