Year 7 maths · M.14 · Operations with fractions and decimals
Multiply 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: −3.9 × (−3.1)
Answer: 12.09
Evaluate: −5.8 × (−4.0)
Answer: 23.2
Evaluate: −6.3 × (−11.8)
Answer: 74.34
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 Divide decimals including negatives Year 7
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