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Numbers up to 100

"Count in tens, recognize two-digit numbers up to 100, and understand tens and ones."

FREE TOPIC 3 learning goals · Class 1 · Maths · Topic 4

A Today you'll learn

  • Count in tens: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
  • Understand two-digit numbers as groups of tens and ones
  • Read and write numbers up to 100 in figures and words

B Let's understand

When we have 10 ones bundled together, they make 1 Ten! Two-digit numbers are made of Tens and Ones. For example, the number 25 means 2 tens and 5 ones (20 + 5). The number 40 means 4 tens and 0 ones. When we count in tens, we say: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100! 100 is ten tens, and it is the very first 3-digit number. Understanding tens and ones makes reading big numbers easy and fun.

C See it step by step

Example 1: What number has 3 tens and 7 ones?
  1. 3 tens = 30.
  2. 7 ones = 7.
  3. 30 + 7 = 37.
  4. The number is 37.
Example 2: How many tens and ones are there in 54?
  1. Look at the left digit (Tens place): 5 tens.
  2. Look at the right digit (Ones place): 4 ones.
  3. 54 = 5 tens and 4 ones (50 + 4).

D Your turn

In the number 68, what is in the tens place?
Look back at "Let's understand" above for a clue.

E Ready to practise?

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