In this lesson children will be practicing decomposition with LEGO people. Decomposition is a skill that requires practice. In earlier lesson we decomposed number 5 (click here), today we are moving up to 10. Math for little kids is about laying a strong foundation. They might know what number 10 is, but number 10 is more than the name it holds. Truly understanding a number requires ability to compose and decompose it. Read more about First Math Lessons here.
What you need
LEGO pieces to build a two-level house LEGO people (10 or less)
Start by building a LEGO house that has two floors. When the house is built say, “LEGO people live in this house. How many people you will place on each floor?” Write it down. “Can you find more than one way to place LEGO people inside the house?” Give them time to think. “You have 2 people on the top floor and 8 people on the bottom floor. That’s great! Let’s write it down 2+8= What’s the total number of LEGO men?” “Can you find another way?” “Do you want me to help you?”
If they are not moving anywhere, prompt with, “What if this LEGO man feels dizzy and wants to move down. How many men do we have on each floor now? What if this repairman needs to go upstairs to fix the bathtub? How many LEGO men on each floor now? What if superman wants to help the repairman and goes upstairs too? How many now? Write it down.
“How many ways do you think there are?” “What makes you say that?” “Do you want to find out how many different ways there are?”