Add a multiple of 10 to make 1,000

What do you need to add to the multiple of ten to make 1,000? How many can you answer in a minute?

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What do you need to add to the multiple of 100 to make 10,000? How many can you answer in a minute?

Add the small numbers together. How many can you answer in a minute?

Add the decimal numbers together. How many can you answer in a minute?

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