Chapter 8 of Class 1 Joyful Mathematics, Fun with Numbers, extends counting well beyond 10 — children learn to count, recognise, write, and arrange numbers from 21 to 99.
Key Concepts
Oral counting 21-99: building on counting up to 20 learned earlier.
Recognising and writing two-digit numerals in this range.
Ordering numbers: arranging a set of numbers from smallest to largest, and largest to smallest; comparing quantities using more than/less than/equal to.
Quick Recap
- Practise counting aloud starting from different numbers (not just from 1) to build flexible number sense.
- Arranging numbers correctly requires comparing them digit by digit, starting from the tens place.
Common Mistake to Avoid
Comparing only the ones digit — when ordering two-digit numbers, the tens digit matters most; 41 is smaller than 39 is wrong, always check tens first (41 is actually bigger than 39).
Frequently Asked Questions
What is a good way to practise counting to 99 at home?
Count everyday objects in groups of ten (like sets of ten buttons) and then count the leftovers, connecting the pattern to two-digit numbers.
How do you correctly compare two two-digit numbers?
Compare the tens digit first; only if the tens digits are equal do you compare the ones digit.
Full walkthrough: Chapter 8 Solutions · Extra Questions.
