Mathematics

Sorting three-digit numbers

An AR classroom game for Grade 3. Learners can aim with their hands at the camera or play by tapping the screen.

This set has 4 rounds in an interactive sorting activity.

Curriculum indicatorค 1.1 ป.3/1

Play Host 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.

01
Sort the numbers into groups.
Sort into
- less than 500
- more than 500
- 234
- 689
- 451
- 902
Read the explanation
Compare with five hundred, going mainly by the hundreds digit.
02
Sort the numbers into groups.
Sort into
- divides exactly by 10
- does not divide exactly by 10
- 250
- 347
- 600
- 185
Read the explanation
A number that divides exactly by ten ends in zero.
03
Sort the sums into groups.
Sort into
- use addition
- use subtraction
- how many altogether?
- how many more?
- how many altogether?
- how many are left?
Read the explanation
The wording of the problem tells you which operation to use.

Before you play

Game teaching guide

What children will practise

Sort three-digit numbers by comparing with 500 and by whether they divide exactly by 10 (indicators ค 1.1 ป.3/1 and ป.3/2), sort word-problem phrases into adding or subtracting, and tell 2D shapes from 3D solids.

What's in the worksheet

4 sorting questions with 2 boxes each - 234 and 451 are less than 500; 689 and 902 are more - 250 and 600 divide exactly by 10; 347 and 185 do not - "How many more?" and "How many are left?" use subtraction; "How many altogether?" uses addition - Triangle and circle are 2D; cube and sphere are 3D

How to use it in class

Use for review at the start of P3, about 6 minutes, team mode. - "How many more?" often confuses pupils. After revealing, give an example: an older sibling has 15 baht and a younger one 9; how many more does the older one have? Show it is subtraction - For 2D and 3D, hold up a paper circle next to a real ball - In English mode Q3 shows two identical "how many altogether?" cards; both go under addition. Play in Thai mode to avoid the confusion - Play it linked to the class to record results in the mark book

Common sticking points

- Putting "How many more?" under addition because of the word "more". Draw two comparison bars and find the difference - Some compare 451 and 689 by the ones or tens first. Stress the hundreds decide - Swapping circle and sphere because the Thai names are similar. Compare real objects