Grade 6 Mathematics · Unit 10: Math Is...Standard MPP.3

Lesson 10.610.6 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 look back at my answers from Lesson 1-1, describe how my math biography has changed this year, and recognize ways we are all doers of math, explain how I can tell, and judge a case I have not seen before.

Remember10.6 Small Group · Group 2

This year's tools let you solve old problems in new ways, and a second method that agrees shows the answer is right. Check an answer a second way. When two different methods agree, you can trust the answer.

Words: math biography (biografía matemática)reflect (reflexionar)growth (crecimiento)confidence (confianza)community (comunidad)

  1. 1Complete each step, then write the final answer.
    Percent25%100%Amount78.5?× ?× ?
    25% of the number is 78.5.

    78.5 is 25% of what number?

    Show your work
    Final answer:
  2. 2Complete each step, then write the final answer.
    Percent25%100%Amount62.5?× ?× ?
    25% of the number is 62.5.

    62.5 is 25% of what number?

    Show your work
    Final answer:
  3. 3Complete each step, then write the final answer.
    Percent100%5%35%Dollars60??÷ ?÷ ?× ?× ?
    Bridge through 5% to find the 35% discount.

    A jacket costs $60. It is on sale for 35% off. What is the sale price?

    Show your work
    Final answer:
  4. 4Complete each step, then write the final answer.
    Percent125%25%100%Amount78.5??÷ ?÷ ?× ?× ?
    Bridge through 25% to reach 100%.

    In September, a student wrote 78.5 = 70 + 8.5. Now use percents. 78.5 is 125% of what number?

    Show your work
    Final answer:

Explain your thinkingWhy can you trust an answer more when two different methods agree? Use the windy-day Ferris wheel.

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