🔢 Numbers up to 20
Class 1 Maths · Unit 3 of 12 · about 120 minutes
Children extend counting and number sense from 9 to 20. They count, read and write numbers to 20, identify before/after/between, understand 'ten and some more' (e.g., 13 = 10 and 3), and order and compare numbers. This unit builds the foundation for addition and subtraction within 20.
What your child will learn
- Students will be able to count objects up to 20 and match the count to the correct numeral.
- Students will be able to read and write numbers from 0 to 20 in numerals and number names.
- Students will be able to identify the number before, after, or between given numbers up to 20.
- Students will be able to represent numbers 11 to 20 as 'ten and some more' using objects or pictures.
- Students will be able to compare two numbers up to 20 using 'greater than', 'less than', or 'equal to'.
- Students will be able to order numbers from 1 to 20 in ascending or descending sequence.
Lessons in this unit
- Counting to 20: Count objects up to 20 and match the count to the numeral. Use concrete objects and pictures.
- Read and write numbers to 20: Read and write numerals and number names from 0 to 20. Practice correct formation.
- Before, after, and between: Identify the number that comes before, after, or between given numbers up to 20.
- Ten and some more: Understand numbers 11 to 20 as 'ten and some more' using ten-frames and objects.
- Compare numbers up to 20: Compare two numbers up to 20 using 'greater than', 'less than', or 'equal to'.
- Order numbers up to 20: Arrange numbers from 1 to 20 in ascending or descending order.
Key words
- before
- The number that comes first, just before another.
- after
- The number that comes next, just after another.
- between
- The number that sits in the middle of two numbers.
- ten and some more
- A number like 13 is 10 and 3 more.
- greater
- Bigger in size or amount.
- less
- Smaller in size or amount.
- order
- Putting numbers from smallest to biggest or biggest to smallest.
Help your child at home
What to watch for
- Skipping a number when counting (e.g., 13, 14, 16).
- Help: Count slowly, touch each object, and say the number aloud.
- Writing 12 as 21 (digit reversal).
- Help: Practice writing numbers with a model and say the digits in order.
- Confusing 'before' and 'after'.
- Help: Use a number line: before is to the left, after is to the right.
- Thinking 13 is '1 and 3' instead of '10 and 3'.
- Help: Show a full ten-frame and 3 more. Count: 10, 11, 12, 13.
Try this at home
- Count the apples, touching each once, and choose the number
- Read the number and write it
- What comes after 14? Put a finger on 14 and move one step right: 15.
- Show 15: fill one ten-frame (10), put 5 in the next frame → 10 and 5
Quick questions to ask aloud
- Count the stars. How many? ⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐ (12 / 11 / 13)
Show answer
Count each star once: 1, 2, 3 ... up to 12. There are 12 stars. - Which number is 'fifteen'? (15 / 50 / 5)
Show answer
'Fifteen' is the number 15. It is 10 and 5 more. - What number comes after 14? (15 / 13 / 16)
Show answer
After 14 comes 15. Count: 14, 15.
Frequently asked questions
What will my child learn in "Numbers up to 20" (Class 1 Maths)?
Your child will be able to: count objects up to 20 and match the count to the correct numeral.; read and write numbers from 0 to 20 in numerals and number names.; identify the number before, after, or between given numbers up to 20.; represent numbers 11 to 20 as 'ten and some more' using objects or pictures.; compare two numbers up to 20 using 'greater than', 'less than', or 'equal to'.; order numbers from 1 to 20 in ascending or descending sequence..
How does MangoMindz teach "Numbers up to 20"?
In 6 short parts (Counting to 20, Read and write numbers to 20, Before, after, and between, Ten and some more, Compare numbers up to 20, Order numbers up to 20). Each part has a picture-based lesson read aloud by Mango Teacher, a quick check, and a quiz built from common mistakes children make, with Mango, a study buddy, for questions.
How long does "Numbers up to 20" take?
About 120 minutes in total, spread over 6 parts of 15–25 minutes each.
How can I help my child with "Numbers up to 20" at home?
Work through a small example together, such as: Count the apples, touching each once, and choose the number; Read the number and write it. Then ask a quick question aloud: Count the stars. How many? ⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐ (12 / 11 / 13)
What mistakes do children often make in "Numbers up to 20"?
Skipping a number when counting (e.g., 13, 14, 16). Fix: Count slowly, touch each object, and say the number aloud. Writing 12 as 21 (digit reversal). Fix: Practice writing numbers with a model and say the digits in order. Confusing 'before' and 'after'. Fix: Use a number line: before is to the left, after is to the right.
Is "Numbers up to 20" free on MangoMindz?
Yes. Every lesson part and quiz in "Numbers up to 20" is free on MangoMindz, with no ads.