Mathematics

Numbers to one hundred

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 1.1 ป.2/1

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
Which number lies between 58 and 60?
- 59
- 61
- 57
Read the explanation
Fifty-nine sits exactly between them.
02
How many tens and ones are in 45?
- 45 tens
- 4 tens and 5 ones
- 5 tens and 4 ones
Read the explanation
Forty-five is four tens and five ones.
03
Which number is the largest?
- 87
- 78
- 89
Read the explanation
Compare the tens first - eighty-nine has the most.

Before you play

Game teaching guide

What children will practise

Read and understand place value in numbers up to 100: the number before, the number between, the largest of three, and that 99 + 1 = 100 (indicator ค 1.1 ป.2/1).

What's in the worksheet

6 multiple-choice questions - Which number lies between 58 and 60? 59 - How many tens and ones are in 45? 4 tens and 5 ones - Which is largest: 87, 78 or 89? 89 - Which number comes just before 40? 39 - 99 + 1 = ? 100, with 991 as a distractor

How to use it in class

Use at the start of the numbers-to-1,000 unit to check the basics up to 100, about 5 minutes, solo mode. - Keep a hundred square beside the screen; for 58-60 and the number before 40, point to it - For 99 + 1, count on past the last row to reach 100 - If many pick 5 tens 4 ones, build 45 with tens rods and unit cubes - The on-screen explanation for the largest-number question says 89 has the most tens, which is wrong: 87 and 89 both have 8 tens. Point out that the ones decide it, 9 is more than 7 - Play it linked to the class to record results in the mark book

Common sticking points

- In 99 + 1, choosing 991 by writing the 1 on the end. Work it on a hundred square or exchange ones for a ten - For 45, choosing 5 tens 4 ones by reading the digits backwards. Stress that the first digit is the tens - For the largest number, 87 and 89 share the same tens; some stop there and pick 87. Teach that when tens are equal you compare the ones