Sign Rules for Multiplication
Multiply and divide with positive and negative integers and rational numbers, understanding the rules for the sign of the product or quotient
Suggested ages 11–13
Evidence of understanding
- Apply the sign rules when multiplying two integers (positive × negative, negative × negative)
- Apply the sign rules when dividing two integers
- Solve multi-step real-world problems involving all four operations with positive and negative rational numbers
Assessment prompt
If Sign Rules for Multiplication knows that a negative times a negative makes a positive, can they use that rule to work out calculations like '−3 × −4 = 12' — and explain why it makes sense?
Standards alignment
Apply and extend previous understandings of multiplication and division to rational numbers
Common Core State Standards for Mathematics · 7
Understand that multiplication is extended from fractions to rational numbers
Common Core State Standards for Mathematics · 7
Understand that integers can be divided
Common Core State Standards for Mathematics · 7
Apply properties of operations as strategies to multiply and divide rational numbers
Common Core State Standards for Mathematics · 7
The Four Operations
The national curriculum in England: Key stages 1 and 2 framework document · Key Stage 3