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How would you estimate the answer to

How would you estimate the answer to. 1,560 ÷ 11?. In this lesson you will learn how to estimate division by setting up an equation. Multiplication and division are inverse operations. 45 ÷ 9 = 5. 9 x 5 = 45. 5 x 9 = 45. Setting up the equation with the dividend as a factor. 63 ÷ 9 = 7

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How would you estimate the answer to

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  1. How would you estimate the answer to 1,560 ÷ 11?

  2. In this lesson you will learn how to estimate division by setting up an equation.

  3. Multiplication and division are inverse operations. 45 ÷ 9 = 5 9 x 5 = 45 5 x 9 = 45

  4. Setting up the equation with the dividend as a factor 63 ÷ 9 = 7 63 x 7 ≠ 9

  5. Variables can express an unknown number in an equation 54 ÷ 9 = n This makes sense since 10 x 5 = 50 9 x n = 54 or n x 9 = 54 Smart estimate n ≈5 10 x n ≈50

  6. This makes sense since 10 x 150 = 1,500 1,560 ÷ 11 = n 11 x n = 1,560 or n x 11 = 1,560 10 x n ≈1,500 Smart estimate n ≈150

  7. There are 1,155 cookies to share with 13 groups of people. About how many cookies will each group get? 1,155 ÷ 13= n Smart estimate n ≈ 110 13 x n = 1,155 This makes sense since 10 x 110 = 1,100 10 x n ≈ 1,100

  8. In this lesson you have learned how to estimate division by setting up an equation.

  9. What is a smart estimate for 2,680÷ 25?

  10. What is a smart estimate for 1,515÷ 12? • Sean has a collection of 2,525 car which he wants to separate into 27 boxes. About how many cars will go in each box?

  11. When using smart rounding in the problem 2,575 ÷25, would you round 2,575 to 2,500 or 3,000? Which one would give you an answer closer to the actual calculation? Explain your answer. • Use smart rounding to estimate the answer to 1,690 ÷ 54.

  12. What is a smart estimate for 2,579 ÷27? A. 100 B. 125 C. 110 Ivan has a collection of 4,579 marbles which he wants to store in 13 containers. About how many marbles will go in each container? C. 250 B. 300 A. 30

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