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Decimals to one place

Mathematics

Decimals to one place

An AR classroom game for Grade 4. Learners can aim with their hands at the camera or play by tapping the screen.

This set has 6 questions in an interactive multiple choice activity.

Curriculum indicatorค 1.1 ป.4/5

PlayHost a classroom

A look before you play

Sample questions

A few real prompts from the game to help you choose an activity for your class.

  1. How do you read 0.3?

    • three tenths
    • three hundredths
    • thirty
    Read the explanation

    One decimal place is read as tenths.

  2. 1.5 + 0.5 = ?

    • 1.10
    • 2.0
    • 1.55
    Read the explanation

    Five tenths plus five tenths is ten tenths, which is one - so the answer is two.

  3. Which number is the largest?

    • 1.9
    • 2.0
    • 2.1
    Read the explanation

    Compare the whole numbers first, then the decimals.

Before you play

Game teaching guide

What children will practise

Understand one-place decimals as tenths (indicator ค 1.1 ป.4/5), compare decimals (ป.4/6), add and subtract one-place decimals (ป.4/15), and write 1/2 as a decimal.

What's in the worksheet

6 multiple-choice questions - How do you read 0.3? The game's answer is "three tenths" - 1.5 + 0.5 = 2.0; distractor 1.10 - Which is largest: 1.9, 2.0 or 2.1? - 3.7 - 1.5 = 2.2 - Which is greater, 0.9 or 0.10? 0.9

How to use it in class

Use after teaching decimals with tenths grids or a number line, about 6 minutes, team mode. - 0.9 versus 0.10 is the most instructive item: teams shade 9 squares and 1 square of a tenths grid to compare - If many pick 1.10 for 1.5 + 0.5, show on a number line that two halves (five tenths each) make one whole - For "how do you read 0.3", tell pupils it is read "zero point three" and is worth three tenths - Play it linked to the class to record results in the mark book

Common sticking points

- Choosing 0.10 over 0.9 because 10 is bigger than 9 in whole numbers. Use a tenths grid - Choosing 1.10 for 1.5 + 0.5 by adding 5 + 5 = 10 and writing it after the point. Stress that ten tenths make one whole - Thinking 2.0 is the smallest of 1.9, 2.0 and 2.1 because of the 0 after the point. Compare the whole numbers first

Play together first, then build on it with a worksheet for the same level.

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