Answer: Eight hundred seven and fifty-seven thousandths
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Explanation:
The number 807 in word form is eight hundred seven. Be sure not to use "and" because this keyword indicates a decimal point.
So for instance, saying "Eight hundred and five tenths" would represent the number 800.5
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The portion after the decimal, the 0.057, represents the value fifty-seven thousandths since that 7 is in the thousandths place value. That decimal value is the same as the fraction 57/1000.
So overall, the entire original number is read out as: Eight hundred seven and fifty-seven thousandths
Notice how I tied together the whole part 807 and the decimal part 0.057 together with the "and" keyword.
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Side note: There's not much work to show. I'm not sure what your teacher is aiming for here.