Words That Mean Addition in Word Problems
These are the 12 signal words that tell you to add in a maths word problem — with a worked example and the most common trap to avoid.
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Common trap
"Increased by" is addition even though it sounds like it could be multiplication. Be careful not to confuse it with "increased by a factor of," which signals multiplication instead.
Addition Signal Words (12)
sum total altogether combined in all both increased by plus added to all together how many in all grand total
Worked Example
Maria has 8 stickers. Her friend gives her 5 more. How many stickers does Maria have in all?
Why Addition?
"In all" tells you to combine the two amounts: 8 + 5 = 13.
✓ Answer: 13 stickers
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Frequently Asked Questions
What are signal words in math?
Signal words are words or phrases in a word problem that indicate which operation to use — e.g., "total" signals addition, "left" signals subtraction, "each" often signals multiplication, and "shared equally" signals division.
Is "increased by" always addition?
Yes — "increased by" signals addition. The only exception is the phrase "increased by a factor of," which signals multiplication. If you see "a factor of," switch to multiplying.