number line (EN)

phrase

phrase “number line”

1. (in education) a visual tool showing numbers on a line to help students learn basic math operations
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   In class, we used the number line to practice adding and subtracting single-digit numbers.
2. (in mathematics) a straight line representing numbers in order, where each point corresponds to a real number
   The number line helps us understand how negative numbers extend infinitely to the left of zero.