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None is zero
★★★When there are none, we write 0 and say "zero".
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Example
The plate is empty. Which number shows that?
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Answer: 0
Knowing zero · Numbers & Operations
When there are none, we write 0 and say zero.
When there are none, we write 0 and say "zero".
This is step 1 of unit 3, “Knowing zero”, in Stage 2: Numbers to 100, carrying and borrowing (ages 7–8). A round has 10 problems; 90% or better earns three stars. Everything is free with no sign-up, and your stars and XP are saved on this device.