plus sign

plus sign — noun

1. the written symbol +, which in mathematics tells you that two numbers should be

1.名詞A1
釋義

the written symbol +, which in mathematics tells you that two numbers should be added together or shows that a number or amount is above zero.

例句

Owen wrote a plus sign between the two numbers on his math homework.

basic addition: plus sign + between + numbers

The teacher drew a large plus sign on the whiteboard and explained what it means.

definitional: teacher explains symbol meaning

同義詞
  • addition symbol

    more descriptive and formal; used in explaining maths concepts to children

反義詞
  • minus sign

    the − symbol, which shows subtraction or a value below zero

用法筆記

In everyday writing, the plus sign before a positive number is often omitted — for example, we write 5°C, not +5°C — but it is always included when emphasising that a value is above zero (e.g. +5°C on a thermometer display).

常見錯誤

❌She wrote 5 × 3 = 8.
✅She wrote 5 + 3 = 8.
💡The plus sign (+) shows you should add, while the multiplication sign (×) is for a different operation.
❌The answer was plus, meaning it was wrong.
✅The teacher put a plus sign next to the answer, meaning it was correct.
💡A plus sign marks a right answer or a positive value, not an error.