# Comparing, Adding & Subtracting Fractions

### Cross Multiply and Smile (XD): Method for Comparing, Adding, and Subtracting Fractions

### The Butterfly: Method for Comparing, Adding, and Subtracting Fractions

### Solve Two-Step Equations by Backtracking

# Greatest Common Factor

### Find the G.C.F. using a Venn diagram:

### Find the G.C.F. using the ladder method:

# G.C.F and L.C.M.

### Find the G.C.F. and L.C.M. of two numbers using prime factorization and a Venn diagram:

### Find the G.C.F. and L.C.M. of two numbers using prime factorization and a Venn diagram:

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