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Unit 3, Lesson 2 Equate and Compare

Unit 3, Lesson 2 Equate and Compare. Inequality. Equal. Equality. Exactly the same amount or value. Condition of being. Not ; opposite of . Equivalent. Equi -. - valent. equal or equally. usually used in combination . Visualize Decimal Equivalents. Equivalent Decimals.

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Unit 3, Lesson 2 Equate and Compare

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  1. Unit 3, Lesson 2Equate and Compare

  2. Inequality Equal Equality Exactly the same amount or value Condition of being Not ; opposite of Equivalent Equi- -valent equal or equally usually used in combination

  3. Visualize Decimal Equivalents • Equivalent Decimals 0.6 = 0.60 = 0.600

  4. 0.60 0.6 Turn and Talk Are they equivalent decimals? “Yes, 0.60 and 0.6 are equivalent decimals because ___________.” .60 and 0.6 “No, 0.60 and 0.6 are not equivalent decimals because ___________.”

  5. Place Value tenths ones >tenths hundredths tenths>hundredths thousandths hundredths >thousandths ones

  6. Let’s Practice… • Turn to page 44 in your Activity Book

  7. Decimal Secret-Code Cards • Turn to page 45 in your Activity Book • Cut along the dotted line on the front of the Decimal Secret-Code Cards to make tenths, hundredths and thousandths cards • Keep all your tenths cards together, all your hundredths cards together, etc. (Place in separate zip lock bags) • Do you notice any patterns that can be seen on the backs of the cards? • The tenths show dimes • The hundredths show pennies • The thousandths show tenths of pennies

  8. Modeling Decimal Numbers Find these three cards!! 0.2 0.06 0.008 Tenths card Hundredths card Thousandths card Place the on top of each other to display the number in standard form. 0.268 Assembled card

  9. Inequality Signs • Describe the meaning of the following symbols: > < • Examples using symbols: • 15 > 12 • 12 < 15 Remember: BIG mouth eats BIG number!!!

  10. Equivalent Decimals • Which number is greater??? 0.6 or 0.28 • How could we make 0.6 and 0.28 have the same number of decimal places? • Write 0 to the right of 0.6 = 0.60 • Would writing a zero to the right of 0.6 change the value of 0.6?

  11. Decimal Secret Cards • Find the following cards 0.3 0.03 0.003 • Using the cards and the < and > signs, arrange all possible comparisons of the three decimal numbers • One possible comparison: • 0.3 > 0.03 • To check your work, use the backs of the cards and think about the values of the dimes, pennies, and tenths of pennies.

  12. Watch Out!!! • Fill in the circles with the correct inequality sign: < or >. • 17 9 but 0.17 0.9 • 17 > 9 but 0.17 < 0.9 • 73 138 but 0.73 0.138 • 73 <138 but 0.73 > 0.138 • 456 8 but 0.456 0.8 • 456 > 8 but 0.456 < 0.8

  13. Hard Back Book page 86 Note: Keep your Decimal Cards. We will use these tomorrow!

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