Grade 2 · Math · Unit 3 of 13
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.
Nunavut Curriculum approved guide: Alberta Mathematics K–9 (2007), Number · representing numbers to 100 and the meaning of place value
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
In 29, what is the 2 worth?
29
- 90
- 20
- 2
20
Hint: The 2 is in the tens place, so it means 2 tens. That's 20.
Question 2
Build the number 27.
Build it with tens rods and ones cubes.
27
Hint: 27 is 2 tens and 7 ones.
Question 3
Build the number 62.
Build it with tens rods and ones cubes.
62
Hint: 62 is 6 tens and 2 ones.
Question 4
What number do the blocks show?
- 19
- 20
- 23
19
Hint: Count the tens: 1 tens is 10. Then add 9 ones to get 19.
Question 5
In 76, what is the 7 worth?
76
- 70
- 7
- 60
70
Hint: The 7 is in the tens place, so it means 7 tens. That's 70.
Question 6
What number do the blocks show?
- 40
- 46
- 50
46
Hint: Count the tens: 4 tens is 40. Then add 6 ones to get 46.