Day 16 of 30
Decompose two-digit numbers
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Learning Objective
I can explore decompose two-digit numbers.
Today we will learn about decompose two-digit numbers. Math helps us solve problems and understand the world around us.
Composing a number means putting parts together to make a number. For example, 10 can be composed from 7 + 3, or 5 + 5, or 6 + 4. Decomposing means breaking a number into parts. For example, 8 can be decomposed into 5 + 3, or 4 + 4, or 2 + 6. Understanding how numbers can be made and broken apart helps with addition, subtraction, and problem-solving. There are many ways to compose and decompose any number!
Let's break this down step by step so it's easy to understand. Follow along with the examples, and don't worry if it takes some practice to get the hang of it!
Remember: Making mistakes is part of learning. If something is tricky, try again, look at the examples, or ask for help.
A question we need to solve
The answer to a problem
Instructions
Materials Needed
- Counters or objects
- Pencil
- Practice sheet
Count the objects: 🍎🍎🍎🍎🍎 How many apples?
What number comes after 7?
Count by 2s: 2, 4, 6, ___, ___
Teaching Tip
For younger learners: Use concrete objects and hands-on activities when teaching decompose two-digit numbers. Keep sessions short (10-15 minutes) and incorporate movement or songs when possible.