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First grade mathematicians will be working this year on number sense in order to improve their understanding of the relationship between numbers and their ability to do mental math. This guided lesson will help strengthen this important skill with targeted instruction and plenty of real-world practice problems. Once the lesson is finished, you can extend learning with the suggested number sense worksheets.

Understanding that addition means putting together and subtraction means taking away is an important building block for young mathematicians. This guided lessons helps preschoolers master this concept, focusing on addition and subtraction within 5. Having a firm grasp of addition and subtraction is crucial for math fluency. Don't forget to check out the addition and subtraction printables that help to extend learning after the lesson is over.