Year 3 Representing 3-digit numbers, comparing and positioning on number lines worksheet

“Hundreds, tens and ones” is free to print, with no account. It is the first sheet in the Year 3 maths unit “Representing 3-digit numbers, comparing and positioning on number lines”, for children aged 7 to 8, and takes about 20 minutes.

Print it on A4. The child's pages come first; the answers, and what each wrong answer tells you, are on the grown-up page that follows. Weeks 7 to 10 of the year, 15 sheets in the unit.

Free sample · answers on the last page

Hundreds, tens and ones

Name: ____________ · Date: ____________
Year 3 · Maths · about 20 minutes
Answers are on the grown-up page

Today I can represent a 3-digit number in different ways, and keep a zero in an empty column.

A Look back3 min

1.
4 tens and 5 ones make
2.
62 26
3.
Count on in tens: 30, 40, 50, , 70

B Watch me, then you4 min

Watch me

The 3 is 3 hundreds, so it is 300.

The 4 is 4 tens, so it is 40.

300 + 40 + 2 makes 342.

Now you

1.
400 + 30 + 6 =

C Your turn6 min

1.
200 + 30 + 5 =
2.
200 + 30 + 0 =
3.
200 + 0 + 5 =
4.
600 + 80 + 0 =

Say it out loud: Which rows had a zero, and in which column? What happened to the number when you forgot it?

D Spot the mistake3 min

Kit says: “3 hundreds and 7 ones makes 37, so the zero does not matter.”

1.
What number is 3 hundreds and 7 ones?

E Think deeper4 min

1.
Using only the digits 3, 0 and 7, write every 3-digit number you can make. Use each digit once.

How did it feel?

I can do it Nearly Not yet

For the grown-up

Hundreds, tens and ones · 2 minutes to read

Answers, and what a wrong one tells you

A

1. 45

2. >

3. 60

B

1. 436 If your child writes 406, the 3 tens have gone. That is 400 + 6. Each part needs its own column, so put 3 in the tens.

C

1. 235

2. 230 If your child writes 23, the zero has gone. 23 is 20 + 3, so the tens are in the wrong place. Ask how many ones there are.

3. 205 If your child writes 25, the hundreds and the empty tens have gone. 25 is 20 + 5. Put 0 in the tens so the 2 stays in the hundreds.

4. 680 If your child writes 68, the hundreds have gone. 68 is 60 + 8. Write the 6 in the hundreds and the 0 in the ones.

D

1. 307 If your child writes 37, the 3 has been read as 3 tens. 37 is 30 + 7. The 3 sits in the hundreds, so keep the 0 in the tens.

E

1. Look for: 307, 370, 703 and 730 listed; 037 is not a 3-digit number so it does not count; a 0 is never put first.

Words to use

Say“Read the number column by column. Which column is empty, and what goes in it?”

Instead of“Just tell them the answer, or say 'You know the rule, just write it.'”

After the sheet

Lay out three cups labelled Hundreds, Tens and Ones. Put 2 buttons in Hundreds, none in Tens and 5 in Ones. Say the number, then build 250.

Tick what your child got right in StudyDen. Anything missed comes back in a later Look back box, so there's no need to redo the sheet.

The rest of this unit

14 more sheets come with a StudyDen plan, in teaching order:

Counting on and back in 10s(with a plan)
Placing numbers on lines(with a plan)
Estimating on Blank Lines(with a plan)
Which number is bigger?(with a plan)
Ordering 3-digit numbers(with a plan)
Hundreds from known facts(with a plan)
Tens hiding in numbers(with a plan)
Splitting numbers in new ways(with a plan)
Known facts for big sums(with a plan)
Known facts and hundreds(with a plan)
Two hops across a hundred(with a plan)
Bridging the hundreds(with a plan)
Counting in 2s, 5s and 25s(with a plan)
Counting in 25s and 50s(with a plan)

Every Year 3 maths worksheet

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