Mathematics
Multiplication & Division
Procedural
11–13 yrs
Sign Rules for Multiplication
乘法的符号规则
Description
Multiply and divide with positive and negative integers and rational numbers, understanding the rules for the sign of the product or quotient
Mastery Evidence
- 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 your child 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?
Prerequisites 1
Positive and Negative Numbers
负数的乘除运算需要先掌握负数的加减运算
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No follow-up topics
