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Grade 1 · Math · Unit 2 of 16

Numbers to 100

Tens, ones and big numbers!

What your child practises

Reading and building numbers to 100 with tens and ones, comparing them, and seeing that two names can mean the same amount.

Nunavut Curriculum approved guide: Nunavut Mathematics K–6 (2025), 1.N.1.1; 1.N.1.3 · counting, comparing and ordering numbers to 100

How we explain it

Children can open this short lesson before they practise.

  1. A 2-digit number has tens and ones.
  2. 10 tens make 100.
  3. Compare the tens first. More tens means bigger.

Example: Which is less: 39 or 42? Tens: 3 tens and 4 tens. 3 tens is less. So 39 is less. Answer: 39

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    23 is 2 tens and how many ones?

    • 0
    • 3
    • 7

  2. Question 2

    What number is shown?

    • 67
    • 68
    • 66

  3. Question 3

    Build the number 47.

    Build it with tens rods and ones cubes.

  4. Question 4

    Which number is less: 72 or 68?

    • 72
    • 68

  5. Question 5

    Is 25 equal to 3 tens and 5 ones?

    • Yes, equal (=)
    • No, not equal (≠)

  6. Question 6

    How many tens make 80?

    • 3
    • 9
    • 8

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