Using objects to model real problems
Use objects, drawings, or simple number sentences to represent a real-world situation (early mathematical modelling)
What a learner can do afterwards
- Draw a picture or use objects to represent a simple real-world situation involving counting or comparing
- Write or dictate a number sentence to describe a real-world situation (e.g. 'I had 5 apples and ate 2')
- Use the model to answer a question about the situation
1 · Read
A math story is something that really happens. You can show it with pictures, objects, or numbers. The sign + means put together, the sign − means take away, and the sign = means the same amount.
Leo had 5 apples. He ate 2. Number sentence: 5 - 2 = 3.
First draw or use objects for the story. Then write the number sentence.
Turn what happens into pictures, then into a number sentence.
More to read
Key ideas: organize, count, and represent a collection of objects
Real problems become easy when you act them out with things. Use cubes, buttons, or drawings for apples, birds, or buses. Put out the right number for each part. Move them to add or take away. The objects show what the words mean.
1.2: Topic B- Counting
Counting objects is the start of modelling. Line them up so you do not miss any. Touch each one as you count. If the story says 5 apples and 2 are eaten, lay out 5 counters and take 2 away. What is left is the answer. A tidy row makes checking simple.
Equal Shares
Sharing fairly is a model you can touch. If 6 biscuits are shared between 2 friends, deal them out one by one. Each friend gets 3. Equal shares mean equal numbers. Drawing plates and dots works the same way when you have no real biscuits.
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2 · Watch
به انگلیسیTake it off screen
Where it sits
Learn first
Nothing; this is a starting point.
Optional connections
This opens up
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
17 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.