Mathematics

Coins, notes and change

An AR classroom game for Grade 2. 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 2.1 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
Two 5-baht coins - how much is that?
- 10
- 15
- 7
Read the explanation
Two five-baht coins is five plus five, or five times two - ten baht.
02
A 20-baht note and a 10-baht coin - how much is that?
- 25
- 30
- 35
Read the explanation
Twenty plus ten makes thirty baht.
03
Something costs 15 baht and you pay with 20. How much change?
- 10
- 15
- 5
Read the explanation
Twenty take away fifteen leaves five baht.

Before you play

Game teaching guide

What children will practise

Total coins and notes and work out change by subtracting, in everyday shopping situations: adding and subtracting within 100 in a money context. It matches the money-problems indicator ค 2.1 ป.3/1, which the curriculum places in P3, so here it lays the groundwork.

What's in the worksheet

6 multiple-choice questions - Two 5-baht coins make 10 baht - A 20-baht note and a 10-baht coin make 30 baht - Something costs 35 baht, you pay 50, change is 15 baht - Five 10-baht coins make 50 baht - You have 100 baht and spend 60, leaving 40

How to use it in class

Play after a pretend shop activity, about 6 minutes. In team mode, give each team a set of play coins and notes. - For change questions, have teams handle the money: put down a 50 and count on from 35 to 50 - If many miss 35 from 50, model how a shopkeeper counts up: 40, 50, then total the coins handed back - Play it linked to the class to record results in the mark book

Common sticking points

- Choosing 20 or 10 for change from 50 on a 35-baht item, from a borrowing slip. Count up from 35 in fives - Choosing 7 for two 5-baht coins, adding the number of coins to the value. Lay out real coins and count 5, 10 - Choosing 50 for 100 - 60 by guessing half is left