Divide two-digit dividends by two-digit divisors with one-digit quotients and remainders in the ones place.
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In Lesson 15, students first encounter a case that requires the need to adjust an estimate, since it is the first time they are estimating not just the dividend but also the divisor and using that estimate to compute. As noted in the Progressions, “even if students round the dividend appropriately, the resulting estimate may need to be adjusted up or down. Sometimes multiplying the ones of a two-digit divisor composes a new thousand, hundred, or ten. These newly composed units can be written as part of the division computation, added mentally, or as part of a separate multiplication computation” (NBT Progression, p. 18).
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Estimate the following quotient. Then compute it.
$$66\div21$$
Solve. Then check your answer using multiplication.
$${84\div23}$$
Grade 5 Mathematics > Module 2 > Topic F > Lesson 20 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..
Modified by The Match Foundation, Inc.A ferry can hold 19 cars. How many trips will it have to make to carry 83 cars across the lake?
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$${78\div21}$$
Grade 5 Mathematics > Module 2 > Topic F > Lesson 20 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..
Modified by The Match Foundation, Inc.Sam played arcade games and won 89 tickets. You can buy 1 prize for every 37 tickets earned. Sam bought as many prizes as he could with his tickets. How many prizes was Sam able to buy?
Grade 5 Mathematics > Module 2 > Topic F > Lesson 20 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..
Modified by The Match Foundation, Inc.?