First Year maths · J.3 · Add and subtract integers
Add integers: all sign combinations
Use the number line, or think about the signs: same signs add and keep the sign, different signs subtract.
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Evaluate: 5 + (−12)
Answer: -7
Evaluate: 10 + 3
Answer: 13
Evaluate: 10 + 7
Answer: 17
Tip: Use the number line, or think about the signs: same signs add and keep the sign, different signs subtract.
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- Next in this topic Subtract integers: positive numbers First Year
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