a. What number should the quotient be close to?
9. b. Describe Noah's mistake.
10. c. What is 1,004 ÷ 20?
Using estimation, 1,004 is close to 1,000. Dividing 1,000 by 20 gives 50. So, the quotient should be close to 50.
Noah's mistake is in the division process. He subtracted 100 from 1,004 and got 04, which is incorrect. He should have continued the division process correctly to find the accurate quotient.
1,004 ÷ 20 = 50.2
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