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Formulas and answers

Mathematics

Formulas and answers

An AR classroom game for Grade 5. 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 2.1 ป.5/2

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 shape to its perimeter formula.

    • square
    • rectangle
    • equilateral triangle
    • circle
    Read the explanation

    A perimeter is all the sides added; the formula is a shortcut for that sum.

  2. Match each sum to its answer.

    • a square with sides of 5
    • a rectangle 4 × 9
    • a triangle with base 6 and height 4
    • a rectangle 7 × 10
    Read the explanation

    Work out the area of each shape and match it.

  3. Match each decimal to its fraction.

    • 0.1
    • 0.2
    • 0.5
    • 0.75
    Read the explanation

    Being able to switch between the two makes the arithmetic much quicker.

Before you play

Game teaching guide

What children will practise

Match shapes to perimeter formulas, work out areas of rectangles and triangles, convert decimals to fractions, and name the statistics mean, mode, range and median.

What's in the worksheet

4 matching rounds of 4 pairs each - Shape to perimeter formula: rectangle with (width + length) × 2, circle with 2 × pi × radius - Question to answer: a square of side 5 with 25, a triangle with base 6 and height 4 with 12 - Decimal to fraction: 0.2 with 1/5, 0.75 with 3/4 - Statistical terms: mode with the value that occurs most often, range with largest minus smallest

How to use it in class

Use as a mixed revision game before the end-of-term test; about 5-6 minutes. - Play in teams, since round 4 uses words some children have not met - Before round 4, either skip it or briefly teach mode, range and median with the class's own scores - In round 2, have children say the answers are areas, not perimeters - Play it linked to the class to record results in the mark book.

Common sticking points

- Round 4: median and mean are easily confused because children call both the middle value; stress that the median needs the data in order - Round 2: having worked out a perimeter of 20 for the square, children cannot find it and pair the square with 70 or 36 - Round 1: the circle formula uses pi, which Grade 5 has not met, so it is usually matched last by elimination

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

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