Module 2 Lesson 18
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Transcript of Module 2 Lesson 18
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Module 2 Lesson 18
Use basic facts to estimate quotients with two-digit divisors.
![Page 2: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/2.jpg)
• 5.NBT.1 Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.5.NBT.6 Find whole-number quotients of whole numbers with up to four-digit dividends and two- digit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.
Common CoreStandards
![Page 3: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/3.jpg)
Learning Targets
•I can use basic facts to estimate quotients with two-digit divisors.
![Page 4: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/4.jpg)
Activate Knowledge
Count by six.
![Page 5: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/5.jpg)
Activate Knowledge
Count by six tens.
When I raise my hand stop counting.
![Page 6: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/6.jpg)
Activate Knowledge
Count by eights.
![Page 7: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/7.jpg)
Activate Knowledge
Count by eight tens.
When I raise my hand stop counting.
![Page 8: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/8.jpg)
Activate Knowledge
Count by nines.
![Page 9: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/9.jpg)
Activate Knowledge
Count by nine tens.
When I raise my hand stop counting.
![Page 10: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/10.jpg)
Activate Knowledge
12,000 ÷ 40
Write the division sentence
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Activate Knowledge
12,000 ÷ 40
Write as a 2 step division sentencetaking out the ten
![Page 12: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/12.jpg)
Activate Knowledge
12,000 ÷ 40
Rewrite after solving the first part of the division problem
12,000 ÷ 10 ÷ 4
![Page 13: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/13.jpg)
Activate Knowledge
12,000 ÷ 40
Write the answer
12,000 ÷ 10 ÷ 4
1200 ÷ 4
![Page 14: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/14.jpg)
Activate Knowledge
12,000 ÷ 400
Write the division sentence
![Page 15: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/15.jpg)
Activate Knowledge
12,000 ÷ 400
Write as a 2 step division sentencetaking out the ten
![Page 16: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/16.jpg)
Activate Knowledge
12,000 ÷ 400
Rewrite after solving the first part of the division problem
12,000 ÷ 100 ÷ 4
![Page 17: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/17.jpg)
Activate Knowledge
12,000 ÷ 4000
Write the answer
12,000 ÷ 100 ÷ 4
120 ÷ 4
![Page 18: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/18.jpg)
Activate Knowledge
12,000 ÷ 4000
Write the division sentence
![Page 19: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/19.jpg)
Activate Knowledge
12,000 ÷ 4000
Write as a 2 step division sentencetaking out the ten
![Page 20: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/20.jpg)
Activate Knowledge
12,000 ÷ 4000
Rewrite after solving the first part of the division problem
12,000 ÷ 1000 ÷ 4
![Page 21: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/21.jpg)
Activate Knowledge
12,000 ÷ 4000
Write the answer
12,000 ÷ 1000 ÷ 4
12 ÷ 4
![Page 22: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/22.jpg)
Activate Knowledge
360,000 ÷ 6,000
Write the division sentence
![Page 23: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/23.jpg)
Activate Knowledge
360,000 ÷ 6,000
Write as a 2 step division sentencetaking out the ten
![Page 24: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/24.jpg)
Activate Knowledge
360,000 ÷ 6,000
Rewrite after solving the first part of the division problem
360,000 ÷ 1000 ÷ 6
![Page 25: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/25.jpg)
Activate Knowledge
360,000 ÷ 6,000
Write the answer
360,000 ÷ 1000 ÷ 6
360 ÷ 6
![Page 26: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/26.jpg)
Activate Knowledge
490,000 ÷ 700
Write the division sentence
![Page 27: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/27.jpg)
Activate Knowledge
490,000 ÷ 700
Write as a 2 step division sentencetaking out the ten
![Page 28: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/28.jpg)
Activate Knowledge
490,000 ÷ 700
Rewrite after solving the first part of the division problem
490,000 ÷ 100 ÷ 7
![Page 29: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/29.jpg)
Activate Knowledge
490,000 ÷ 700
Write the answer
490,000 ÷ 100 ÷ 7
4900 ÷ 7
![Page 30: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/30.jpg)
Activate Knowledge
640,000 ÷ 80
Write the division sentence
![Page 31: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/31.jpg)
Activate Knowledge
640,000 ÷ 80
Write as a 2 step division sentencetaking out the ten
![Page 32: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/32.jpg)
Activate Knowledge
640,000 ÷ 80
Rewrite after solving the first part of the division problem
640,000 ÷ 10 ÷ 8
![Page 33: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/33.jpg)
Activate Knowledge
640,000 ÷ 80
Write the answer
640,000 ÷ 10 ÷ 8
64,000 ÷ 8
![Page 34: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/34.jpg)
Activate Knowledge
812 ÷ 39
Round the divisor to the nearest 10
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Activate Knowledge
812 ÷ 39
Name the multiple of 40 that’s closest to 812
812 ÷ 40
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Activate Knowledge
812 ÷ 39
Below 800 ÷ 40, write the answer
812 ÷ 40
812 ÷ 39 ≈ 800 ÷ 40
![Page 37: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/37.jpg)
Activate Knowledge
183 ÷ 31
Round the divisor to the nearest 10
![Page 38: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/38.jpg)
Activate Knowledge
183 ÷ 31
Name the multiple of 30 that’s closest to 183
183 ÷ 30
![Page 39: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/39.jpg)
Activate Knowledge
183 ÷ 31
Below 180 ÷ 30, write the answer
183 ÷ 30
183 ÷ 31 ≈ 180 ÷ 30
![Page 40: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/40.jpg)
Activate Knowledge
437 ÷ 72
Round the divisor to the nearest 10
![Page 41: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/41.jpg)
Activate Knowledge
437 ÷ 72
Name the multiple of 70 that’s closest to 437
437 ÷ 70
![Page 42: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/42.jpg)
Activate Knowledge
437 ÷ 72
Below 420 ÷ 70, write the answer
437 ÷ 70
437 ÷ 72 ≈ 420 ÷ 70
![Page 43: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/43.jpg)
Activate Knowledge
823 ÷ 97
Round the divisor to the nearest 10
![Page 44: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/44.jpg)
Activate Knowledge
823 ÷ 97
Name the multiple of 100 that’s closest to 823
823 ÷ 100
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Activate Knowledge
823 ÷ 97
Below 800 ÷ 100, write the answer
823 ÷ 100
823 ÷ 97 ≈ 800 ÷ 100
![Page 46: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/46.jpg)
Activate Knowledge
8,191 ÷ 92
Round the divisor to the nearest 10
![Page 47: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/47.jpg)
Activate Knowledge
8,191 ÷ 92
Name the multiple of 90 that’s closest to 8,191
8,191 ÷ 90
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Activate Knowledge
8,191 ÷ 92
Below 8100 ÷ 90, write the answer
8,191 ÷ 90
8,191 ÷ 92 ≈ 8100 ÷ 90
![Page 49: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/49.jpg)
Activate Knowledge
Sandra bought 38 DVD movies for $874. Give an estimate of the cost
of each DVD movie.
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Learn
Problem 1
8,095 ÷ 23
Which should round first,the whole or divisor?
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Learn
Problem 1
8,095 ÷ 23
What’s 23 rounded to the nearest ten?
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Learn
Problem 1
8,095 ÷ 23
Round 8,095 so it is easy to divide by 20
8,095 ÷ 20
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Learn
Problem 1
8,095 ÷ 23
Round 8,095 so it is easy to divide by 20
8,095 ÷ 20
8,000 ÷ 20
![Page 55: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/55.jpg)
Learn
Problem 1
8,095 ÷ 23
Round 8,095 so it is easy to divide by 20
8,095 ÷ 20
8,000 ÷ 20
8,000 ÷ 10 ÷ 2
800 ÷ 2
![Page 56: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/56.jpg)
Learn
Problem 2
2,691 ÷ 48
Which should round first,the whole or divisor?
![Page 57: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/57.jpg)
Learn
Problem 2
2,691 ÷ 48
What’s 48 rounded to the nearest ten?
![Page 58: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/58.jpg)
Learn
Problem 2
2,691 ÷ 48
Round 2,691 so it is easy to divide by 50
2,691 ÷ 50
![Page 59: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/59.jpg)
Learn
Problem 2
Round 2,691 so it is easy to divide by 50
2,500 ÷ 50
2,691 ÷ 48
2,691 ÷ 50
3,000 ÷ 50
![Page 60: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/60.jpg)
Learn
Problem 2
Round 8,095 so it is easy to divide by 20
2,500 ÷ 10 ÷ 5
250 ÷ 5
2,691 ÷ 48
2,691 ÷ 50
2,500 ÷ 503,000 ÷ 50
3,000 ÷ 10 ÷ 5
300 ÷ 5
![Page 61: Module 2 Lesson 18](https://reader036.fdocuments.in/reader036/viewer/2022062308/568132a6550346895d994799/html5/thumbnails/61.jpg)
Learn
Problem 2
5,484 ÷ 71
Work independently to estimate
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Learn
Problem 2
9,215 ÷ 95
Should we round the divisorup or down?
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Practice
QuickTime™ and aH.264 decompressor
are needed to see this picture.
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Review