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Are the following statements about number always true, sometimes true or never true?
How do you know?
Can you find examples or counter-examples for each one?
For the 'sometimes' cards can you explain when they are true? Or rewrite them so that they are always true or never true?
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When you add two numbers you
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If you add 10 and take away 1,
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When you add 10 to a number,
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When you subtract one number from another number you can change the order and the answer will be the same |
What about these statements about shapes?
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If you put two squares together
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3D shapes have more than
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When you cut a square in half
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Four sided shapes are called squares |
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Three sided shapes are called triangles
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You could cut out each set of statement cards and arrange them in this grid.
Alternatively, you could use these interactivities to organise your thinking:
Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?