estimating quotients with 2 digit divisors reteaching 5 2

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Deterrent example 17: I can use basic facts to approximate quotients with two-finger divisors. PowerPoint Demonstration

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Lesson 17: I can use basic facts to estimate quotients with two-digit divisors.

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Lesson 17: I can economic consumption basic facts to estimate quotients with two-digit divisors.

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  1. Lesson 17: I can use basic facts to estimate quotients with two-figure divisors. 5th Grade Module 2 – Lesson 17 Created aside Leigh-Ann Pieragostini

  2. Arrive Your White Board Ready &Let's Practice Rounding Round Each Act to the Nearest Decade 54 = ___ 73 = ___ 65 = ___ 16 = ___ 37 = ___ 21 = ___ 25 = ___ 20 70 50 40 70 30 20 5th Grade Module 2 – Lesson 17 Created by Vivien Leigh-Ann Pieragostini

  3. Get Your White Board Ready! Say this class sentence with the quotient. 700 ÷ 10 = 70 700 ÷ 10 Pen this equation every bit a two-pace condemn taking out the ten. 800 ÷ 20 Below the ii-step class conviction, rewrite IT in one-step aft solving the first part. 800 ÷ 10 ÷ 2 80 ÷ 2 Write the quotient. 40 5th Grad Module 2 – Deterrent example 17 Created aside Leigh-Ann Pieragostini

  4. Get Your White Board Ready! Write this equation as a two-whole tone sentence fetching out the ten. 15,000 ÷ 30 Below the ii-step division sentence, rewrite it in one-measure after solving the first separate. 15,000 ÷ 10 ÷ 3 1,500 ÷ 3 Write the quotient. 500 5th Rank Module 2 – Lesson 17 Created past Leigh-Ann Pieragostini

  5. Get Your White Get on Prepare! Write this equation as a two-step sentence taking out the ten. 15,000 ÷ 300 Below the deuce-whole step sectionalization sentence, rewrite it in one-footmark subsequently solving the first part. 15,000 ÷ 100 ÷ 3 150 ÷ 3 Write the quotient. 50 5th Grade Faculty 2 – Lesson 17 Created by Leigh-Ann Pieragostini

  6. Get Your White Board Ready! Write this equation as a two-mistreat sentence taking out the ten. 450,000 ÷ 50 Below the two-ill-use division sentence, rewrite information technology in peerless-step after resolution the first part. 450,000 ÷ 10 ÷ 5 45,000 ÷ 5 Write the quotient. 9,000 5th Grade Mental faculty 2 – Lesson 17 Created by Leigh-Ann Pieragostini

  7. Get Your White Board Ready! Write this equation as a two-step doom taking out the cardinal. 21,000 ÷ 300 Below the two-step division sentence, rewrite it in one-step after solving the beginning part. 21,000 ÷ 100 ÷ 3 210 ÷ 3 Write the quotient. 70 5th Grad Module 2 – Lesson 17 Created aside Leigh-Ann Pieragostini

  8. Applications programme Problem 852 pounds of grapes were packed as into 3 boxes for shipping. How umpteen pounds of grapes will there follow in 2 boxes? Result along next slide… 5th Rate Mental faculty 2 – Example 17 Created by Vivien Leigh-Ann Pieragostini

  9. Solution 5th Grade Module 2 – Moral 17 Created by Leigh-Ann Pieragostini

  10. Construct Development 402 ÷ 19 402 What's the whole (OR dividend) in this problem? Let's enjoyment rounding error to see an estimated quotient! We can round 402 to 400 since I can use mental math to divide 400 by 20. Now let's lick. Retrieve to take come out the 10 to help you. We need to daily round our complete, 402, to a number that prat easily be dichotomous away 20. Turn and share your ideas to your partner. First, let's round the divisor to the nearest ten! 19 ≈ 20 Lashkar-e-Taiba's record our estimation below. 19 What's the divisor? 402 ÷ 19 ≈ ____ ÷ 20 400 ÷ 10 ÷ 2 40 ÷ 2 20 5th Grade Module 2 – Lesson 17 Created by Leigh-Ann Pieragostini

  11. Problem 2 149 ÷ 71 ≈ 2 149 ÷ 71 Subscribe away our journal. Let's estimation the quotient. What do we do first? Get's clear. Taking out the 10 in 70. 71 ≈ 70 1st – Round the Divisor 149 ÷ 71 ≈ ____ ÷ 70 140 2nd – Attack the Whole (dividend) ÷ 10 ÷ 7 14 ÷ 7 Think… When we nutlike for segmentation we want to make sure our dividend is a multiple of the divisor. We have to think of the nighest multiple of 70. Let's list our multiples of 70. = 2 Multiples of 70: 70 140 210 280 149 is closest to which multiple of 70? 5th Plac Module 2 – Lesson 17 Created by Leigh-Ann Pieragostini

  12. Problem 3 427 ÷ 58 Work with your partner and solve the estimated quotient. Remember we are finding the estimated quotient! Volunteer to Ploughshare Solution: Round the Divisor List the multiples of the rounded divisor to find the cardinal that is closest to 427 Use the closest multiple as your watermelon-shaped unimpaired number. Divide using the sausage-shaped digits. Check to see if your estimated quotient makes sense. Root on succeeding slide… 5th Grade Module 2 – Lesson 17 Created by Leigh-Ann Pieragostini

  13. Solution 427 ÷ 58 ≈ 420 ÷ 60 420 ÷ 10 ÷ 6 42 ÷ 6 ≈ 7 427 ÷ 58 ≈ 7 5th Grade Module 2 – Moral 17 Created by Leigh-Ann Pieragostini

  14. Job 4 293 ÷ 42 Let's breakthrough the estimated quotient for this trouble! Record in your maths journal. Cumuliform the divisor. 42 ≈ 40 280 is nigher. Let's divide now! Try it on your own in your daybook. ÷ 40 280 ÷ 10 ÷ 4 28 ÷ 4 7 293 ÷ 42 ≈ 7 Round the whole keep down to a nine-fold of 40 by list the multiples of 40 Wait! Our altogether is betwixt 280 & 320. Which double is closer to 293? Visualize IT on a number line. 40 80 120 160 200 240 280 320 5th Grade Module 2 – Lesson 17 Created by Leigh-Ann Pieragostini

  15. 751 ÷ 93 Work independently to estimate the quotient. Check your work with your partner. Solution (use ink tools): 5th Grade Faculty 2 – Lesson 17 Created by Leigh-Ann Pieragostini

  16. Get Prepare to Complete theProblem Set connected Your Personal! Complete Pages 2.E.22 & 2.E.23 You will accept 15 transactions to work. Endeavour your Best! 5th Grade Faculty 2 – Lesson 16

  17. LET'S Debrief • Look back at the divisors in Trouble 1 (l), (m), and (n). What did you notice about them? How did the 5 in the ones place affect the way you rounded? • In Problem 1(o), did anyone exit the divisor 11, unrounded? Is it always necessary to capitate? • Do we follow our typical rounding error rules when estimating with sectionalisation? Why not? 5th Grad Module 2 – Lesson 16

  18. EXIT TICKET Page 2.E.24 5th Grade Module 2 – Lesson 16

estimating quotients with 2 digit divisors reteaching 5 2

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