Grade 6 Mathematics · Pre-UnitStandard MPP.3

Lesson 1.11.1 Small Group · Group 2

Group 2 · Set BSecond challenge form · new problems, same idea

Mastery check☐ Exceeds☐ Meets target☐ Needs practice
Name Date Period

Learning target I can describe the ways we are all doers of math, and compare my math story with a classmate's, explain how I can tell, and judge a case I have not seen before.

Remember1.1 Small Group · Group 2

Know which way you rounded, because rounding down gives a low estimate and rounding up gives a high one. Rounding makes an estimate easy, but you must know if the estimate is too high or too low.

Words: doer of math (persona que hace matemáticas)math story (historia matemática)strength (fortaleza)decompose (descomponer)estimate (estimar)

  1. 1Complete each step, then write the final answer.

    A Ferris wheel has 19 cars. Each car holds 6 people. Lee estimates 20 × 6 = 120 people. What is the exact number of people one turn can carry?

    Show your work
    Final answer:
  2. 2Complete each step, then write the final answer.

    Ben estimates 39 × 5 as 40 × 5 = 200. What is the exact answer?

    Show your work
    Final answer:
  3. 3Complete each step, then write the final answer.

    A class needs 23 packs of paper. Each pack costs $4. Ms. Ruiz rounds 23 to 20 and brings $80. How much more money does she need?

    Show your work
    Final answer:
  4. 4Complete each step, then write the final answer.

    Pia rounds both numbers up to estimate 18 × 7 as 20 × 10 = 200. How far is her estimate from the exact answer?

    Show your work
    Final answer:

Explain your thinkingHow can you tell if an estimate is too high or too low? When does that matter?

How did it go? ☐ 4 · I can teach it☐ 3 · I've got it☐ 2 · I need a hint☐ 1 · I need help