Number System & Operations

How to work through it

1. Start with Topic 1 (factors & GCF/LCM) even if it feels easy, every fraction topic later depends on it.
2. Do every exercise on paper before opening solutions; use hints only after a real attempt.
3. Finish all four topics in order, then retake any quiz where you scored below 80%.
4. Use the external practice links for extra drill if you miss GCF/LCM problems twice.
5. Before Unit 2, you should simplify fractions quickly without a calculator.

You should be able to

• •Find GCF and LCM of two whole numbers using lists or prime factorization.
• •Add and subtract fractions with unlike denominators.
• •Multiply and divide fractions and mixed numbers in context problems.
• •Place fractions on a number line and compare them.

Key words

Factor

A number that divides evenly into another.

Multiple

The product of a number and an integer.

GCF

Greatest Common Factor - the biggest shared factor.

LCM

Least Common Multiple - the smallest shared multiple.

Extra practice links