# Number and Operations: Primes, Composites and Common Factors

##### This Number and Operations: Primes, Composites and Common Factors worksheet also includes:

Incorporate riddles into your math lesson by having students make tree factors and determine if the number is a prime or composite. They will also use other clues to find the answer to the riddle while sharpening their multiplication skills.

65 Views 57 Downloads
CCSS: Adaptable

##### Instructional Ideas

• Supplement this resource into a primary lesson series on common factors
• Drawing factor trees and Venn diagrams can be messy if students are trying to solve the problem in a small space; make sure they have plenty of paper and space to answer the equations
• Consider whether or not you want kids using a calculator. If you don't, edit the sentence permitting them to do so
##### Classroom Considerations

• Use projector to explain the lesson using factor trees and Venn diagrams so pupils have a better understanding before exploring on their own
• Graph paper might be useful for solving the equations
##### Pros

• Extension activities included
• Worksheet bridges gap from knowing it to doing it

• None