# Chapter 11

## Quiz by Nina Weisling

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15 questions

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- Q1What are compatible pairs in addition?Numbers that add or subtract without regroupingNumbers that are evenNumbers that have the same number of digitsNumbers that easily combine to equal benchmark numbers300s
- Q2When adding 10 on a hundreds chart, the most efficient strategy that demonstrates place value understanding is to:move to the left 10 spaces.move to the right 10 spaces.move down one row directly below the number.move up one row directly above the number.300s
- Q3Invented strategies are:digit-oriented rather than number-oriented.generally slower than standard algorithms.the basis for mental computation and estimation."right-handed" rather than "left-handed" (students start on the right).300s
- Q4The following statements are true about the benefits of invented strategies except:more teaching is required.are faster than the standard algorithm.basis for mental computation and estimation.students develop number sense.300s
- Q5Algorithms should have the following characteristics. Which of the follow does not belong?Efficiency (effective approach)Series of steps (memorized)Transparency (process is understood)Reliability (correct answer if carried out properly)300s
- Q6Which of the following is not a common type of invented strategy for addition and subtraction situations?Shortcut strategyHigh-Low strategyJump strategySplit strategy300s
- Q7Which of the following is a common model to support invented strategies?Sentence stripGeoboardHundreds chartOpen number line300s
- Q8Think addition to solve a subtraction story would be effective for three of these problems. Which of the following would not be efficient?Lynn had some pencils and she decided to sharpen 32 of them, she has 63 of sharpened and not sharpened altogether. How many are not sharpened?Lynn had a collection of 52 pencil and she gave 6 of them to her best friend. How many pencils does she have now?Lynn gave some of her pencil collection to the teacher for use as extra pencils. She counted 52 pencils before giving them away. Now she has 43, how many did she give to the teacher?Lynn had a collection of 52 pencils. She traded for more pencil with a friend and now she has 63. How many did she obtain in her trade?300s
- Q9Which of the following instructional activities would be an important component of a lesson on addition with regrouping?Reviewing the concept of greater than and less thanUsing base-ten materials to model the problemAdding basic facts with sums to tenDemonstrating the commutative property of addition300s
- Q10Each of the models below is an effective tool to support invented strategies for addition and subtraction except:virtual base-ten blocks.bar diagrams.chunking off.open number line.300s
- Q11Computational estimation refers to which of the following?Substituting close compatible numbers for difficult-to-handle numbers so that computations can be done mentallyA guess of what an answer could beApproximating the number of items in a collectionDetermining an approximate measure without making an exact measurement300s
- Q12When teaching computational estimation, it is important to:explain that there is one best way to estimate.point out in a class discussion the students who are the farthest "off."declare that the child with the closest estimate is the winner, as a motivation tool.accept a range of reasonable answers.300s
- Q13To find 63 - 46, Joe began by finding 6 - 4 and then 6 - 3 and wrote 23 as the answer. How would you respond?Joe's method is correct because he subtracted the tens from the tens and the ones from the ones. Therefore, Joe got the correct answer.Joe should use the equal-additions algorithm and base ten blocks to help him with his subtraction.Joe should use the scratch method to help him with his subtraction.Joe's method is correct because he subtracted the tens from the tens and the ones from the ones. However, he made a mistake in his subtraction and got an incorrect answer.300s
- Q14In new math textbooks, there is an emphasis on mental mathematics and estimation. Explain why these topics are important for today's students.Mental math and estimation are needed in order to pay bills at various businesses.Mental math and estimation help students to know whether answers that appear on their calculators are reasonable.Mental math and estimation help with teaching place value.Mental math and estimation helps students to perform calculations more precisely.300s
- Q15Is the front-end estimate for addition before adjustment always less than the exact sum? Explain why or why not. Choose the correct response below.The front-end estimation is always more than the exact sum because an adjustment is usually needed.The front-end estimation is almost always less than the exact sum because an adjustment is usually needed. The only case where the estimation is the exact sum is when all of the front-end numbers are followed by zeros.The front-end estimation is always the exact sum because the adjustments cancel the trailing digits.The front-end estimation is always less than the exact sum because an adjustment is always needed.300s