Timed: add these multiples of one million

Add these multiples of one million. How many can you answer in a minute?

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Calculate how many is needed to total 1.

Add two 6-digit multiples of 10,000. How many can you answer in a minute?

Add a multiple of 1,000 to make 100,000. How many can you answer in a minute?

Add a multiple of 10,000 to make 1,000,000. How many can you answer in a minute?