First Year maths · M.13 · Operations with fractions and decimals
Add and subtract decimals including negatives
Line up the decimal points to add or subtract. The sign rules are the same as for integers.
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See worked examples
Evaluate: 6.3 − (−4.3)
Answer: 10.6
Evaluate: −5.1 − (−6.2)
Answer: 1.1
Evaluate: −7.4 − (−4.4)
Answer: -3
Tip: Line up the decimal points to add or subtract. The sign rules are the same as for integers.
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- Next in this topic Multiply decimals including negatives First Year
- Need a warm-up? Add decimals with different numbers of places Sixth Class
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