Unit 7- How Many Tens? How Many Ones?

Your child will be counting by groups, initially by 2s and by 5s, which lays the foundation for counting by 10s and their work with groups of tens and ones and place value. We will work on adding and subtracting 10 to any number and on adding and subtracting multiples of 10. Students will also be developing strategies for adding 2-digit numbers. Throughout this unit, students work with contexts and models that represent 10s and 1s, and they are encouraged to use these models to represent their work. 

Activities to Try at Home 

Counting Feet Read How Many Feet in the Bed? (see below) and talk about the mathematics in the book. Pose questions such as: “How many feet are on this page? How did you figure it out?” Then ask your child to figure out how many feet are in your family. You can extend this conversation by asking about how many eyes, toes, ears, etc. Feel free to add more people and pets! “What if Grandma and her dog came over, then how many eyes would there be?” 

Counting by Tens We are going to be thinking a lot about groups of 10. You can count by 10s together, forward and back, to practice the sequence of numbers. You can also find ways to represent that count: for example, “There are 5 of us having dinner tonight. How many fingers are there? How could we figure that out?” After finding the total number of fingers, you can ask questions such as, “What if Nana joined us for dinner?” or “What if Dad left for work before we had dinner?” 

Organizing Objects into Groups of Ten Ask your child to count a set of objects by putting them into groups of 10 and then figuring out the total number. Or have them first count the set by 1s and then ask, “You have 48 connecting cubes. Suppose you made towers of 10. How many cube towers would you have? How many leftovers?”