Posted in Making totals, Numicon

Using Numicon® to find pairs that make 10

Digit Dog is looking for two Numicon® shapes that are equal to the 10 shape. Calculating Cat is challenging him to find another two shapes, and then another two, and then another two.

Making 10 with Numicon

 

Find one example, then another, then another, then one your friend hasn’t found is a good strategy to encourage learners to use their reasoning skills. Once they have found one pair of shapes challenge them to find another pair, ask:

Is this pair different?

How will you know when you have found all the pairs?

How are you going to record your work?

Look at the pairs that your friend has found. Are they the same? Different?

Are there any shapes you haven’t used? Why?

Encourage learners to check their pairs by putting them on the 10 shape.

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Can you put your pairs of shapes in order?

Why can’t you use the 5 shape?

What if……….

You choose three shapes to total 10? How many ways can you do it?

 

 

Posted in Making totals

Find a pair of cards that make 10, and another, and another……..

Digit Dog and Calculating Cat are finding pairs of digit cards that make 10.

Digit Dog has found two cards that total 10. Calculating Cat is challenging him to find another two cards, and then another two, and then another two.

Making 10

 

Find one example, then another, then another, then one your friend hasn’t found is a good strategy to encourage learners to use their reasoning skills. Once they have found one pair of cards challenge them to find another pair, ask:

Is this pair different?

How will you know when you have found all the pairs?

How are you going to record your work?

Look at the pairs that your friend has found. Are they the same? Different?

Look for learners who:

  • are systematic when looking for all the pairs that make 10.
  • can explain how they know they have found all the pairs.
  • are looking for patterns.
  • can organise their work.

What if……….

You choose three digit cards to total 10? How many ways can you do it?

Download a set of Digit Dog’s 0 – 9 cards here  Print double-sided to have DIgit Dog on the back!

Download a baseboard here

Posted in combinations, Easter, Making totals, Money

Coin combinations

Buying an egg

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Digit Dog has bought a chocolate egg for 50p. He paid for it using silver coins. Which coins do you think he used? Which coins did he definitely not use? Why?

How many different ways do you think he could pay? Convince me that you have found all the different ways. Explain your thinking.

What is the least number of coins he could use? What is the most?

What if…………..

……..Digit Dog bought something for 50p, 75p, £1……..any amount you like?

……..he could use any coins? How many ways to pay would there be then?

Make up some questions like this for your friends.

 

 

Posted in Easter, Numicon, Problem solving

Collect the Easter Eggs

Collecting eggs

Digit Dog is collecting eggs from the Easter Bunny’s store. Here is a map of the store. (download and print your store here

Digit Dog counters

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There are 8 rooms and the number tells you how many eggs are in each room. Digit Dog has to go into the rooms and collect the eggs BUT he can only go into each room ONCE.

How many presents can Digit Dog collect?

How many different ways can he go though the store?

Can you record his routes? How might you do this?

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Can you do it a different way, Digit Dog, and collect more eggs?

What’s the most eggs you can collect?

What’s the smallest number of eggs?

Look for children who are planning the routes and can explain their thinking.

Simplify the task

  1. Put Numicon® shapes in each room so that Digit Dog can collect a shape when he has gone through the room. These can then be added together to find the total number of eggs.

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I went to rooms 1, 2, 3, 7 and 8. How many eggs did I collect altogether?

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I have put the shapes on the number line so that I can see the total without counting in ones.

Calculating Cat
Calculating Cat says that you can make 10s with the shapes and that makes it easy to find the total. 10, 20, 21

 

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2. Use the blank store and put just numbers 1, 2 and 3 in the rooms.

3. Put just Numicon® shapes in the rooms – no numerals.

4. Put mini-eggs in the rooms. Instead of counting in ones, put the eggs in the Numicon® ten-shapes to find the total.

Extend the challenge

Use the blank store and put higher numbers in each room.

Challenge children to find all possible routes and to explain how they know they have found them all.

Posted in Easter, Numicon, Problem solving

Cover the animals

Easter animals

Digit Dog and Calculating Cat are using the Numicon® shapes to cover the picture of the Easter Chick .

You will need the Chick picture (download and print on yellow paper) and a set of Numicon® shapes. Ask learners to use the Numicon® shapes to cover the chick in any way they can.

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How many different ways can you do it? Describe what you’ve done.

Compare your chick with your friend’s. What’s the same and what’s different? How did you check that your way was different from your friend’s?

Play What’s missing?

  1. When the chick is covered with shapes, one child closes their eyes, another takes away one shape. Which one is missing? How do you know?
  2. Put some shapes in a feely bag, take them out one at a time and place on the chick. Can you find the shapes you want by touch alone?  This helps with visualising the shapes.

Ask:

How did you cover the chick? How many shapes did you use? Talk about how you chose the shapes. Which shapes were most useful?

Can you cover the chick using different shapes?

How many different ways can you do it?

What is the fewest number of shapes you can use? The most?

Can you just use odd shapes? Even shapes?

What if you weren’t allowed to use the same shape more than once? How many ways can you do it? Is this more difficult? What are you thinking?

Can you use one shape repeatedly to cover the chick? Which shapes will work? Which won’t? Why?

Encourage learners to describe and explain what they are doing.

Look for those learners who have a strategy for choosing shapes and those who use trial and improvement.

Look for learners who swap shapes for other equivalent shapes each time they look for a new arrangement rather than starting from the beginning.

Encourage learners to put all their completed chicks together and ask “what is the same?” “what is different?”

 

Try the same activities with the Easter Bunny  (download here).

 

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Posted in Uncategorized

Spring Chicks

Digit Dog and Calculating Cat are trying one of the Numicon Ideas for Spring resources that they found on www.oxfordowl.co.uk

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How can Calculating Cat share the chicks between the 3 nests? Try it.

How many chicks will be in each nest? Convince your friend that you are right.

Write a dividing calculation to go with your representation.

Try different numbers of nests – can you share the 12 chicks equally between 2 nests? What about 4 nests, 5 nests, 6 nests? What do you notice?

Try a different number of chicks. What happens?

Posted in Calculating, Easter

Calculating Chicks

The chicks are hiding

Screenshot 2018-03-22 23.20.51

This type of word problem requires more thinking than the problems where the end result is unknown e.g. “There are 4 chicks in my egg and 4 chicks on the floor.  How many chicks are there altogether?”

Ask learners to:

  • Explain how to find out how many chicks are in the egg.
  • Describe the strategy they have used:
    • act it out – with children or toy chicks
    • use counters to represent the chicks
    • draw pictures
    • use an eight Numicon shape
    • use number bonds
  • Convince everyone that their answer is correct.

What number sentence can you write about the problem?

Make up some of your own problems like this one for your friend.

What if……….

………there were more than 8 chicks altogether?

………there were more or fewer chicks outside the egg?

…….the story wasn’t about chicks?

 

Posted in Easter, Games

Easter Race to 10

A game for any number of players.

You will need:

  • A Numicon 10 shape each
  • A 1 – 3 dice
  • Mini eggs for each player

Take turns to throw the dice. Count the number of eggs and put them on the 10 shape. The first person to get to 10 wins.

As you play describe how many eggs you have:

“I have ……… eggs. I need ……….more to make 10”.

During the game take time to look at each other’s shapes and talk about similarities and differences.

IMG_1593

How many eggs does Digit Dog have?

How many eggs does Calculating Cat have?

Who has fewer eggs? How many fewer? Explain how you know.

Who has more eggs? How many more?

How many more eggs does Digit Dog need to make 10? What about Calculating Cat?

 

 

Posted in Easter

Easter estimating 2

An estimation activity inspired by www.stevewyborney.com

Open the powerpoint, show the first slide and ask:

How many eggs do you think are in the pot?

Take some estimations and then reveal the answer.

Show the second slide. The first image is the pot from Slide 1.

Click to reveal a second image and ask:

How many are there in this pot? How are we going to estimate? Are there more or fewer than the first pot? How many more/fewer? Discuss some estimations before revealing the answer.

Click to reveal a third image. What about this pot? How many eggs? Ask for estimations and ask learners to explain why they chose the number they did. Why did you choose that number? Explain your reasoning.

Click to reveal the fourth image and see if learners are refining their strategies for estimating. Are they just guessing or are they using what they know about previous pots and reasoning about the number of eggs?

Estimating powerpoint

 

 

 

 

 

 

 

Posted in Counting, Easter, Estimation

Easter estimating

Digit Dog and Calculating Cat are estimating how many eggs are in the pot.

IMG_1595 (1)

“I wonder how many eggs are in the pot?”

Can you estimate?

What do you think?

Will there be more than 10? How many more? A lot more? A few more?

Will there be more than a 100?

Digit Dog and Calculating Cat used the egg boxes to help find out how many eggs there are. They wanted to organise the eggs so that they could see how many there are without counting in ones.

IMG_1596 (1)

 

What do you notice?

How do the egg boxes help to see how many eggs there are?

How can you count them?

What questions can you ask?

Next they used the Numicon shapes to help them count.

IMG_1597 (1)

 

What’s the same and what is different?

Posted in Easter

Easter counting competition

How many objects can you fit in the egg?

Digit Dog and Calculating Cat are trying to fill their plastic eggs with as many objects as they can.

Give each child an empty plastic Easter egg and ask them to fill it with as many objects as they can.

fill the egg

 

 

 

Fill the egg Cy

Count the objects to see who has the most. Ask children to organise the objects so that they can see how many there are without counting in ones.

They can do this by:

  1. Putting the objects into the holes on Numicon ten-shapes. How many do you have?  “I have one ten and seven”.
IMG_2475
Calculating Cat’s objects.
IMG_2478
Digit Dog’s objects.

How many objects does Digit Dog have? Don’t count in ones.

Does he have more or fewer objects than Calculating Cat? Explain how you know.

2. Organising the objects into the Numicon shape patterns to help organise the count.

Screenshot 2018-03-23 08.27.30

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3. Putting the objects on a 10-frame.

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Calculating Cat
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Digit Dog

Who collected the most objects? How do you know?

How many more objects does Calculating Cat need so that she has 20? How can you work it out by looking at the 10-frame?

4. Putting the objects in egg boxes.

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Calculating Cat
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Digit Dog

Who won the competition? Who had more objects? Who had fewer objects? Can you quickly count the objects?

What is the largest number of objects that you could fit in the egg?

Can you write the number? Can you build the number with Numicon or Base 10 resources?

Make a class list to record the number of objects each child collects. Compare the numbers. Order the numbers.

Posted in 2-sided beans, Making totals, Visualising

Two-sided beans – Under the Cup

Under the Cup

beans under cup

How can you work out how many beans are under Digit Dog’s cup?

Explain how you know.

Convince me you’re right.

How do you think Calculating Cat used the 5-frame to help her work it out?

What if Digit Dog had 3 beans on top? How many would be underneath?

 

Play Under the Cup

Each player has a cup and 5 beans and takes turns to hide some of their beans under their cup.

Everyone closes their eyes and Player 1 puts some beans on top of their cup and some underneath. Everyone opens their eyes and Player 1 says “I have 5 beans altogether. I have ….beans on top of my cup. How many are hidden?” The other players work out how many beans are under the cup and explain how they know. Convince me that you’re right.

Encourage learners to visualise the beans under the cup. How many more do you need to make 5?

Use the 5-frames to help children begin to visualise. They need an action and an image before they can work out this problem mentally.

Step 1

Move the beans from the top of the cup and put them on the frame and say how many more are needed to make 5.

beans under cup 2

Step 2

Have the frame in front of learners but visualise the beans on it rather than actually move them. Imagine that the beans are moving. Describe what you can “see”.

Step 3

Remove the frame but visualise it. Visualise the frame and moving the beans onto it.

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Use Numicon shapes in the same way as the frames to help visualise the problem.

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Download the challenge card here