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Grade 2 · Math · Unit 1 of 9

Tens & Ones

Build numbers to 100

What your child practises

Seeing 47 as 4 tens and 7 ones. This place-value idea underpins all Grade 2 adding and subtracting.

Newfoundland and Labrador Curriculum curriculum outcome: Number sense and number theory (by Grade 3) · representing and partitioning numbers to 100 and place value

How we explain it

Children can open this short lesson before they practise.

  1. A 2-digit number is made of tens and ones.
  2. The first digit counts tens. The second counts ones.
  3. Add the parts: 4 tens and 6 ones is 40 + 6.

Example: What number do 5 tens and 3 ones make? 5 tens is 50. 50 + 3 = 53. Answer: 53

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

    In 29, what is the 2 worth?

    29

    • 90
    • 20
    • 2

  2. Question 2

    Build the number 27.

    Build it with tens rods and ones cubes.

  3. Question 3

    Build the number 62.

    Build it with tens rods and ones cubes.

  4. Question 4

    What number do the blocks show?

    • 19
    • 20
    • 23

  5. Question 5

    In 76, what is the 7 worth?

    76

    • 70
    • 7
    • 60

  6. Question 6

    What number do the blocks show?

    • 40
    • 46
    • 50

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