Unit 6: Fractions and Decimals

Day 26 of 30

Add decimals in tenths using models

K-2Mathematics

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Learning Objective

I can add decimals in tenths using models.

Today's Lesson

Today we will learn how to add decimals in tenths using models. Math helps us solve problems and understand the world around us.

A decimal is another way to show parts of a whole, using a decimal point. The digits to the right of the decimal point show tenths, hundredths, thousandths, and so on. For example, 0.5 means 5 tenths (which equals 1/2). The number 3.25 means 3 whole ones plus 2 tenths plus 5 hundredths. Decimals are useful for money, measurements, and precise calculations.

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 add decimals in tenths using models. 2. Try the examples together. 3. Solve practice problems. 4. Check your work.
Materials Needed
  • Counters or objects
  • Pencil
  • Practice sheet
Practice Problems
1

Write 3/10 as a decimal.

Hint: The denominator 10 means tenths place.
2

Which is larger: 0.5 or 0.25?

Hint: 0.5 is the same as 5 tenths.
3

Add: 2.3 + 1.6 = ___

Hint: Line up the decimal points.

Teaching Tip

For younger learners: Use concrete objects and hands-on activities when teaching add decimals in tenths using models. Keep sessions short (10-15 minutes) and incorporate movement or songs when possible.

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