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Matching products, rounding and angles

Mathematics

Matching products, rounding and angles

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 4 rounds in an interactive matching activity.

Curriculum indicatorค 1.1 ป.4/9

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. Match each multiplication to its answer.

    • 14 × 3
    • 16 × 4
    • 21 × 5
    • 18 × 2
    Read the explanation

    Multiplying a two-digit number by a single digit.

  2. Match each number to its rounded value.

    • 23
    • 38
    • 51
    • 67
    Read the explanation

    Round to the nearest ten.

  3. Match each angle to its kind.

    • 45 degrees
    • 90 degrees
    • 120 degrees
    • 180 degrees
    Read the explanation

    Classify angles by their size, using ninety and one hundred and eighty as the marks.

Before you play

Game teaching guide

What children will practise

Multiply two-digit by one-digit numbers (indicator ค 1.1 ป.4/9), round to the nearest ten (indicator ค 1.1 ป.4/7), classify angles by their degrees (ค 2.2 ป.4/1), and match units to what they measure.

What's in the worksheet

4 matching questions - 14 × 3 = 42, 16 × 4 = 64, 21 × 5 = 105, 18 × 2 = 36 - Round 23 to 20, 38 to 40, 51 to 50, 67 to 70 - 45 degrees acute, 90 right, 120 obtuse, 180 straight - Square centimetre with area, millilitre with volume of liquid

How to use it in class

Use for P4 mid-term review, about 6 minutes, team mode. - For rounding, draw a 20 to 70 number line and have teams point to the nearest ten for each number - 21 × 5 = 105 is the only three-digit product - For angles, teams draw 120 degrees with a protractor next to 90 degrees - Play it linked to the class to record results in the mark book

Common sticking points

- For 16 × 4 and 14 × 3, forgetting to carry gives 44 or 32, which are not on the cards, so pupils guess. Work on paper - Rounding 51 up to 60, thinking rounding always goes up. Use the number line - Not knowing 180 degrees is a straight angle because it looks like a line. Open a book until it lies flat

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

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