Teaching pack · Year 6 Numberseegongsik /au
Adding and Subtracting Decimals: a week of ready-to-teach maths
Five days of lessons for Year 6 Number. Print this pack and the week is prepared.
AC9M6N04
apply knowledge of place value to add and subtract decimals, using digital tools where appropriate; use estimation and rounding to check the reasonableness of answers
Start here: five minutes to Monday
- Skim the week at a glance.
- Print the five days (plan + worksheet each).
- Cut out the card sheet once.
- Open the free interactive unit on your board.
- Teach from the plan.
On the board
On-screen pictures: “Decimal place value”, “Lining up to add”, “Adding decimals”, “Subtracting decimals”, “Estimating with rounding”.
seegongsik.com/au/y6/number/AC9M6N04
Aligned to Australian Curriculum V9 (AC9M6N04). Original material from seegongsik. Descriptors (c) ACARA, CC BY 4.0.
The week at a glance5 lessons
The week at a glance
One lesson a day. Run them in order where you can.
| Day | Lesson | Children learn and do | On screen |
|---|---|---|---|
| 1 | Decimal place value | Practise the idea with talk, board and worksheet | Board: Decimal place value |
| 2 | Lining up to add | Practise the idea with talk, board and worksheet | Board: Lining up to add |
| 3 | Adding decimals | Practise the idea with talk, board and worksheet | Board: Adding decimals |
| 4 | Subtracting decimals | Practise the idea with talk, board and worksheet | Board: Subtracting decimals |
| 5 | Estimating with rounding | Practise the idea with talk, board and worksheet | Board: Estimating with rounding |
Materials
- This pack printed.
- Pencils and the board or projector.
- Optional counters or rulers if a day plan names them.
A note home
This week in maths we work on adding and subtracting decimals. Ask: What did you practise today?
seegongsik.com/au/y6/number/AC9M6N04/pack
Day 1 · Teacher planDay 1 of 5
Decimal place value
Children practise “Decimal place value” with talk, the board picture, and a short worksheet. About 40 minutes.
We are learning to
- explain decimal place value in Year 6 words,
- use the board picture to check thinking,
- record an example on paper.
Success criteria
- I can show one example of today’s idea.
- I can say the idea in a short sentence.
You need
- interactive unit open on “Decimal place value”,
- worksheet (next sheet), one per child,
Lesson flow (about 40 minutes)
| 5 min | Warm-up Ask: “What might help us today?” |
| 10 min | On the board Open “Decimal place value”. Ask: “What changed on the screen?” |
| 15 min | Worksheet Children complete the day sheet. |
| 10 min | Share Ask: “In one sentence, what was today’s idea?” |
On the board
Leave “Decimal place value” on screen for the main block.
seegongsik.com/au/y6/number/AC9M6N04
Watch for
- Skipping the board -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Answers and look-fors
- Meeting the idea sounds like a clear sentence about decimal place value.
Day 1 · Worksheet
Decimal place value
NameClassDate
Use the board picture. Show your thinking.
1. Draw or write one example from the board.
2. What is the main idea in your words?
3. Make a second example of your own.
I know I am right because
I can teach this idea to a partner:Yes □ No □
Day 2 · Teacher planDay 2 of 5
Lining up to add
Children practise “Lining up to add” with talk, the board picture, and a short worksheet. About 40 minutes.
We are learning to
- explain lining up to add in Year 6 words,
- use the board picture to check thinking,
- record an example on paper.
Success criteria
- I can show one example of today’s idea.
- I can say the idea in a short sentence.
You need
- interactive unit open on “Lining up to add”,
- worksheet (next sheet), one per child,
Lesson flow (about 40 minutes)
| 5 min | Warm-up Ask: “What might help us today?” |
| 10 min | On the board Open “Lining up to add”. Ask: “What changed on the screen?” |
| 15 min | Worksheet Children complete the day sheet. |
| 10 min | Share Ask: “In one sentence, what was today’s idea?” |
On the board
Leave “Lining up to add” on screen for the main block.
seegongsik.com/au/y6/number/AC9M6N04
Watch for
- Skipping the board -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Answers and look-fors
- Meeting the idea sounds like a clear sentence about lining up to add.
Day 2 · Worksheet
Lining up to add
NameClassDate
Use the board picture. Show your thinking.
1. Draw or write one example from the board.
2. What is the main idea in your words?
3. Make a second example of your own.
I know I am right because
I can teach this idea to a partner:Yes □ No □
Day 3 · Teacher planDay 3 of 5
Adding decimals
Children practise “Adding decimals” with talk, the board picture, and a short worksheet. About 40 minutes.
We are learning to
- explain adding decimals in Year 6 words,
- use the board picture to check thinking,
- record an example on paper.
Success criteria
- I can show one example of today’s idea.
- I can say the idea in a short sentence.
You need
- interactive unit open on “Adding decimals”,
- worksheet (next sheet), one per child,
Lesson flow (about 40 minutes)
| 5 min | Warm-up Ask: “What might help us today?” |
| 10 min | On the board Open “Adding decimals”. Ask: “What changed on the screen?” |
| 15 min | Worksheet Children complete the day sheet. |
| 10 min | Share Ask: “In one sentence, what was today’s idea?” |
On the board
Leave “Adding decimals” on screen for the main block.
seegongsik.com/au/y6/number/AC9M6N04
Watch for
- Skipping the board -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Answers and look-fors
- Meeting the idea sounds like a clear sentence about adding decimals.
Day 3 · Worksheet
Adding decimals
NameClassDate
Use the board picture. Show your thinking.
1. Draw or write one example from the board.
2. What is the main idea in your words?
3. Make a second example of your own.
I know I am right because
I can teach this idea to a partner:Yes □ No □
Day 4 · Teacher planDay 4 of 5
Subtracting decimals
Children practise “Subtracting decimals” with talk, the board picture, and a short worksheet. About 40 minutes.
We are learning to
- explain subtracting decimals in Year 6 words,
- use the board picture to check thinking,
- record an example on paper.
Success criteria
- I can show one example of today’s idea.
- I can say the idea in a short sentence.
You need
- interactive unit open on “Subtracting decimals”,
- worksheet (next sheet), one per child,
Lesson flow (about 40 minutes)
| 5 min | Warm-up Ask: “What might help us today?” |
| 10 min | On the board Open “Subtracting decimals”. Ask: “What changed on the screen?” |
| 15 min | Worksheet Children complete the day sheet. |
| 10 min | Share Ask: “In one sentence, what was today’s idea?” |
On the board
Leave “Subtracting decimals” on screen for the main block.
seegongsik.com/au/y6/number/AC9M6N04
Watch for
- Skipping the board -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Answers and look-fors
- Meeting the idea sounds like a clear sentence about subtracting decimals.
Day 4 · Worksheet
Subtracting decimals
NameClassDate
Use the board picture. Show your thinking.
1. Draw or write one example from the board.
2. What is the main idea in your words?
3. Make a second example of your own.
I know I am right because
I can teach this idea to a partner:Yes □ No □
Day 5 · Teacher planDay 5 of 5
Estimating with rounding
Children practise “Estimating with rounding” with talk, the board picture, and a short worksheet. About 40 minutes.
We are learning to
- explain estimating with rounding in Year 6 words,
- use the board picture to check thinking,
- record an example on paper.
Success criteria
- I can show one example of today’s idea.
- I can say the idea in a short sentence.
You need
- interactive unit open on “Estimating with rounding”,
- worksheet (next sheet), one per child,
Lesson flow (about 40 minutes)
| 5 min | Warm-up Ask: “What might help us today?” |
| 10 min | On the board Open “Estimating with rounding”. Ask: “What changed on the screen?” |
| 15 min | Worksheet Children complete the day sheet. |
| 10 min | Share Ask: “In one sentence, what was today’s idea?” |
On the board
Leave “Estimating with rounding” on screen for the main block.
seegongsik.com/au/y6/number/AC9M6N04
Watch for
- Skipping the board -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Answers and look-fors
- Meeting the idea sounds like a clear sentence about estimating with rounding.
Day 5 · Worksheet
Estimating with rounding
NameClassDate
Use the board picture. Show your thinking.
1. Draw or write one example from the board.
2. What is the main idea in your words?
3. Make a second example of your own.
I know I am right because
I can teach this idea to a partner:Yes □ No □
Cut-out cardsReuse all week
Talk cards for Adding and Subtracting Decimals
Cut out. Hold up a card and give an example.
Decimal place value
Give an example.
Lining up to add
Give an example.
Adding decimals
Give an example.
Subtracting decimals
Give an example.
Estimating with rounding
Give an example.
Store in an envelope labelled AC9M6N04.
Mini-check · End of week
Show what you know: Adding and Subtracting Decimals
NameClassDate
Work on your own. Use pictures or numbers.
1. Draw or write the big idea of this week.
2. Give one clear example.
3. Give a second different example.
4. What mistake should we watch for?
I can explain this idea to a partner:Yes □ No □
Mini-check · AnswersTeacher
Answers and look-fors
- Item 1 names the unit idea (adding and subtracting decimals) in child words.
- Items 2-3: two different correct examples.
- Item 4: a real muddle for this topic.
Use day-plan look-fors across the week.