Grade 3 · Math · Unit 1 of 15
Numbers to 1000
Hundreds, tens and ones
What your child practises
Reading, building, comparing and ordering numbers to 1000 as hundreds, tens and ones, including tricky zeros and regrouping (12 tens is 1 hundred and 2 tens).
Ontario Curriculum expectation: B1.1, B1.2, B1.5 · reading, comparing and using place value for whole numbers up to 1000
How we explain it
Children can open this short lesson before they practise.
- A 3-digit number has hundreds, tens and ones.
- Each digit is worth its place: 4 in the hundreds place is 400.
- Add the parts to write the number.
Example: Write 4 hundreds, 3 tens and 6 ones as a number. 400 + 30 + 6 Answer: 436
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
What number goes where the ? is?
- 790
- 770
- 780
- 800
Show answer
790
Hint: The labels go up by 50, and each small mark is 10 more. Count by 10s from 750.
Question 2
Which sign goes in the box?
955 914
- <
- =
- >
Show answer
>
Hint: The hundreds are the same, so compare the tens. The open side of < or > faces the bigger number, 955.
Question 3
What number is this?
100 + 3 = ?
answer box
Show answer
103
Hint: There are no tens, so put a 0 in the tens place: 103.
Question 4
What number do the blocks show?
answer box
Show answer
114
Hint: Count the big squares by 100s, the long rods by 10s and the small cubes by 1s: 100 + 10 + 4 = 114.
Question 5
What is 100 more than 671?
answer box
Show answer
771
Hint: Only the hundreds digit changes. It goes up by 1: 771.
Question 6
In 267, what is the 6 worth?
267
- 60
- 6
- 600
Show answer
60
Hint: The 6 is in the tens place, so it is worth 6 tens: 60.