Transcription
Quick CheckName6-6A1. Evaluate the expression[(12 3 2.4) 2 (8.4 4 0.6)] 1 33 2 5.1.2. Evaluate the expression42 2 9 4 [(2.4 3 7) 1 (0.6 3 2)].A 9.84A 41.5B 14.16B 38.875C 36.7C 3.8875D 49.3D 3.66673. Which expression has a value of 66?A (16 4 3.2) 3 2 1 0.2 3 (8 1 82)B [(16 4 3.2) 3 (2 1 0.2)] 3 8 1 82C 16 4 [(3.2 3 2) 1 (0.2 3 8)] 1 82D [16 4 (3.2 3 2) 1 0.2 3 (8 1 82)]4. Writing to Explain Sela simplified the expression52 3 [6 3 (52 2 8) 1 12] 4 5 and found the answer to be 770.Rudi simplified the same expression and found the answer tobe 570. Which girl is correct? Explain.Rudi:52 3 [6 3 (52 2 8) 1 12] 4 552 3 [6 3 (25 2 8) 1 12] 4 552 3 [6 3 (17) 1 12] 4 552 3 [102 1 12] 4 552 3 [114] 4 525 3 114 4 52,850 4 5570Sela:52 3 [6 3 (52 2 8) 1 12] 4 552 3 [6 3 (25 2 8) 1 12] 4 552 3 [150 2 8 1 12] 4 552 3 [142 1 12] 4 552 3 154 4 525 3 154 4 53,850 4 5770Q 6 6ACopyright Pearson Education, Inc., or its affiliates. All Rights Reserved. 5
Par tnerTalkShk.areworyour thinking while youGet StartedorGet 10 squares in one color and 10 in another color.Get two number cubes. Take turns with another player or team.Talk about math as you play!At YourTurnToss two number cubes. Add the dots. Find your toss below.Follow the directions. Explain your thinking. Cover the answer.If the answer is taken, lose your turn. Have fun!TossExplain how to use the correct order ofoperations to evaluate the expression.You may use paper and a pencil.7(6.2 4.3) 52[(8 x 2.5) 4] 1.38(8.3 – 1.7) 6316.4 – [44.4 11.1] 397.6 – (9.6 3) 249.3 [(15 – 7) 4.5]105.3 [(4 3.5) 7]5[2 (75 3)] – 9.711[(3 4.6) – 5.1] 2.665.2 (3.6 – 2.1)122.9 (8.1 0.9) 29.9How toWinYou win if you are the first to get four connected rectangles, like:If you havemore timePlay again!Center Activity H 6-6ACopyright Pearson Education, Inc., or its affiliates. All Rights Reserved. 5
Par tnerTalkShk.areworyour thinking while youGet StartedorGet 10 squares in one color and 10 in another color.Get two number cubes. Take turns with another player or team.Talk about math as you play!At YourTurnToss two number cubes. Add the dots. Find your toss below.Follow the directions. Explain your thinking. Cover the answer.If the answer is taken, lose your turn. Have fun!TossExplain how to use the correct order ofoperations to evaluate the expression.You may use paper and a pencil.73.6 5.7 2218.4 – 3.1 5 2814.7 7 8.137.2 9 3 – 1.692.5 2 3.4 – 1.644.5 9 3 2.3104 3.2 – 7.2 855 – 3.6 6 1118.4 4 2.6 269.2 – 6.3 7124.9 10.5 5 .9How toWinYou win if you are the first to get four connected rectangles, like:If you havemore timePlay again!Center Activity HH 6-6ACopyright Pearson Education, Inc., or its affiliates. All Rights Reserved. 5
ReteachingName6-6AEvaluating ExpressionsBrackets and parentheses are both used to show groupings.Brackets are used to avoid double parentheses: [( instead of ((.Evaluate expressions according to the order of operations.1. Evaluate inside parentheses, thenevaluate inside brackets.2.32 1 [(9 3 0.4) 1 (3 3 0.8)] 3 1.22.32 1 [3.6 1 2.4] 3 1.22.32 1 6 3 1.22. Evaluate terms with exponents.2.32 1 6 3 1.25.29 1 6 3 1.23. Multiply and divide from left toright.5.29 1 6 3 1.25.29 1 7.24. Add and subtract from left toright.5.29 1 7.212.49Evaluate each expression.1. (4.8 4 2) 3 52. 3.6 1 (3 3 9.6 2 4.8)3. [(6.2 3 8.4) 2 9.28]4. [7 3 (9.6 4 3)] 1 12.45. 6 3 [(6 3 2.3) 1 3.9]6. 24 4 [(3.35 3 0.8) 1 5.32]7. 9.6 1 [(3.1 3 2) 2 2.3] 1 428. 62 2 9 4 [(0.24 3 5) 1 (0.66 3 5)]9. How would you use estimation to evaluate this expression:10.2 3 [(2 3 3.7) 1 8]?R 6 6ACopyright Pearson Education, Inc., or its affiliates. All Rights Reserved. 5
PracticeName6-6AEvaluating Expressions1. 52 (3.1 6 5.3)2.3. 32 [(12 22) 0.6]4. [(0.2 8) (2.5 3)] 525. 42 [8.6 (8 0.2)]6. 33 4.2 8 0.27. 6.8 [(0.5 7) (3.1 3)]8. 52 [(62 32.4) (8 0.5)] 4.59. 9 [(4.2 3.3) (6.4 0.8)] 342 [(4.2 3.5) 9.5]10. 41 32 (8 2.3) 15 (2.1 4)11. Keisha bought a new pair of skis for 450. She put 120 downand got a student discount of 45. Her mother gave her 12 of thebalance for her birthday. Which of these expressions could beused to find the amount Keisha still owes on the skis?A 450 120 45 2C 450 (120 45) 2B [450 (120 45) 2]D [450 (120 45)] 212. (7 3.4) [(2.8 5) (4.3 2)] 42. Give the order ofoperations a student solving this problem would use toevaluate the expression. Solve.P 6 6ACopyright Pearson Education, Inc., or its affiliates. All Rights Reserved. 5
EnrichmentName6-6APrime TimeEvery number greater than 5 can be written as the sum of threeprime numbers. For example, 13 3 3 7 or 13 3 5 5.Express the numbers below as the sum of three prime numbers.Write the primes in the squares.1.2. 17 10 15 21 32 3030422 T03 3-7E-13. 30422 T03 3-7E-24. 30422 T03 3-7E-35. 30422 T03 3-7E-46. 30422 T03 3-7E-530422 T03 3-7E-6E 6 6ACopyright Pearson Education, Inc., or its affiliates. All Rights Reserved. 5
Scott Foresman Addison Wesley, enVision Math Author: Pearson Scott Foresman Subject: Scott Foresman Addison Wesley, enVision Math Created Date: 7/22/2011 8:55:51 PM .
