Unit 3: Number Sense and Place Value

Day 27 of 30

Read and write three-digit numbers

K-2Mathematics

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Learning Objective

I can read and write three-digit numbers.

Today's Lesson

Today we will learn how to read and write three-digit numbers. Math helps us solve problems and understand the world around us.

Three-digit numbers have a hundreds place, tens place, and ones place. In the number 347: the 3 is in the hundreds place (= 300), the 4 is in the tens place (= 40), the 7 is in the ones place (= 7). Total: 300 + 40 + 7 = 347 (expanded form). Reading three-digit numbers: say the hundreds digit + "hundred" + the remaining two-digit number ("three hundred forty-seven"). On a hundreds chart (1–100), each row increases by 1 and each column increases by 10 going down. Understanding hundreds is essential for addition and subtraction with regrouping.

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.

Key Terms
Problem

A question we need to solve

Solution

The answer to a problem

Activities
Instructions
1. Use objects or pictures to explore read and write three-digit numbers. 2. Try the examples together. 3. Solve practice problems. 4. Check your work.
Materials Needed
  • Counters or objects
  • Pencil
  • Practice sheet
Practice Problems
1

Count the objects: 🍎🍎🍎🍎🍎 How many apples?

Hint: Point to each apple as you count.
2

What number comes after 7?

Hint: Count: 6, 7, ___
3

Count by 2s: 2, 4, 6, ___, ___

Hint: Add 2 each time.

Teaching Tip

For younger learners: Use concrete objects and hands-on activities when teaching read and write three-digit numbers. Keep sessions short (10-15 minutes) and incorporate movement or songs when possible.

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