Mathematics for Elementary Teachers with Activities (5th Edition)
5th Edition
ISBN: 9780134392790
Author: Beckmann, Sybilla
Publisher: PEARSON
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Textbook Question
Chapter 3.4, Problem 19P
a. Write and solve a Compare problem that can be solved by calculating
b. Write and solve a Compare problem that can be solved by calculating
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Equilibrium Equations: Two-dimensional
2.28
Ra=
Rc=
2.29 (change force to 600N)
AC=
AB=
2.33
CD=
AC=
DE=
BC=
Free Body Diagrams
2.34
Ax=
Ay=_
Bx=
By=
2.36
Ax=
Ay=
Bx=
By=
2.37 (change middle force to 4000 lbs)
Ay=_
Dx=
Dy=_
2.38 (change horizontal force to 2 kN)
Ax=
Ay=
Bx=
By=_
2.40
Ay=
By=
Dx=
32%
Bx=
Cy=
Dy=
Equilibrium Equations: Two-dimensional
2.28
Ra=
Rc=
2.29 (change force to 600N)
AC=
AB=
2.33
CD=
AC=
DE=
BC=
Free Body Diagrams
2.34
Ax=
Ay=_
Bx=
By=
2.36
Ax=
Ay=
Bx=
By=
2.37 (change middle force to 4000 lbs)
Ay=_
Dx=
Dy=_
2.38 (change horizontal force to 2 kN)
Ax=
Ay=
Bx=
By=_
2.40
Ay=
By=
Dx=
32%
Bx=
Cy=
Dy=
Chapter 3 Solutions
Mathematics for Elementary Teachers with Activities (5th Edition)
Ch. 3.1 - Write an Add To problem that fits naturally with...Ch. 3.1 - Write a Put Together/Take Apart, Both Addends...Ch. 3.1 - Write two versions of a Compare, Difference...Ch. 3.1 - Write two versions of a Compare, Bigger Unknown...Ch. 3.1 - Identify the type and subtype of each of the...Ch. 3.1 - Write an Add To, a Put Together/Take Apart, and a...Ch. 3.1 - Write a Take From, a Put Together/Take Apart, and...Ch. 3.1 - Write an Add To problem that can be solved by...Ch. 3.2 - Many teachers have a collection of small cubes...Ch. 3.2 - Discuss the difference between the commutative...
Ch. 3.2 - Figure 3.13 indicates a make-a-ten method for...Ch. 3.2 - Tomaslav has learned the following facts well: All...Ch. 3.2 - Give an example of an arithmetic problem that can...Ch. 3.2 - Give an example of an arithmetic problem that can...Ch. 3.2 - Describe a way to calculate 304-81 mentally, by...Ch. 3.2 - To calculate 15973, a student writes the following...Ch. 3.2 - To calculate 20188, a student writes the following...Ch. 3.2 - David and Ashley want to calculate 8.272.98 by...Ch. 3.2 - Tylishia says that she can calculate 324197 by...Ch. 3.2 - *Is there an associative property of subtracting?...Ch. 3.2 - *Is there a commutative property of subtraction?...Ch. 3.3 - Refer to Class Activity 3l, Adding and Subtracting...Ch. 3.3 - Describe how to use bundled things to explain...Ch. 3.3 - Describe how to use bundled things to explain...Ch. 3.3 - Allie solves the subtraction problem 3049 as...Ch. 3.3 - Zachary added 3.4+2.7 and got the answer 5.11. How...Ch. 3.3 - To solve 512146, a student writes the following:...Ch. 3.3 - Problem: Matteo is 4 feet 3 inches tall. Nico is 3...Ch. 3.3 - Problem: A container holds 2 quarts and 4 fluid...Ch. 3.3 - On a space shuttle mission, a certain experiment...Ch. 3.3 - We can write dates and times in a sort of expanded...Ch. 3.3 - Erin wants to figure out how much time elapsed...Ch. 3.3 - The standard subtraction algorithm described in...Ch. 3.3 - The standard subtraction algorithm described in...Ch. 3.3 - Here’s how Mo solved the subtraction problem...Ch. 3.3 - *After you solve part (b) of this problem, think...Ch. 3.4 - Using the example 27+37, explain why we add...Ch. 3.4 - Using the example 23+34, explain why we add...Ch. 3.4 - Using the example 356, describe the procedure for...Ch. 3.4 - Use two number lines, one labeled with (fractions...Ch. 3.4 - For each of the following decimals, show how to...Ch. 3.4 - Show how to calculate the sum 25+0.25 and show how...Ch. 3.4 - Show how to calculate 538+123 in two different...Ch. 3.4 - Show how to calculate 423+134 in two different...Ch. 3.4 - Find two different positive fractions whose sum is...Ch. 3.4 - John says 23+33=46 and uses the drawing in Figure...Ch. 3.4 - Denise says that 2312=13 and gives the reasoning...Ch. 3.4 - Arnold says that 223=45, and he uses the drawing...Ch. 3.4 - Can the following problems about voters be solved...Ch. 3.4 - Can the following problems about a bird feeder be...Ch. 3.4 - Can the following problems about Sarah’s bead...Ch. 3.4 - Can the following problem about Jim’s medicine be...Ch. 3.4 - a. Write and solve a word problem for 34+23. b....Ch. 3.4 - a. Write and solve a word problem for 212+113. b....Ch. 3.4 - a. Write and solve a Compare problem that can be...Ch. 3.4 - a. Write and solve a Put Together/Take Apart...Ch. 3.4 - For each square in Figure 3.33, determine the...Ch. 3.4 - For each square in Figure 3.34, determine the...Ch. 3.4 - Broad Street divides Popperville into an east side...Ch. 3.4 - Anklescratch County and Kneebend County are two...Ch. 3.4 - There are two elementary schools in the town of...Ch. 3.4 - Suppose you start with a fraction and you add 1 to...Ch. 3.4 - *In the first part of the season, the Bluejays...Ch. 3.5 - Write an Add To problem that fits naturally with...Ch. 3.5 - Write a Compare problem that fits with the...Ch. 3.5 - a. Show how to use a number line to calculate...Ch. 3.5 - For each of these four expressions,...
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- You can add the two forces together to get the total force at each joint.arrow_forwardFor 2.29 Find the forces in AC and CB (not AB) that are pushing on the joint C. Please also include an arrow that shows how the forces are pushing on joint C. Are they pushing on C or pulling on C. For 2.29 change force to 600N.arrow_forward1. Let n be an integer. Show that gcd (n², n² + n + 1) = 1. Note: You must justify every step of your proof using a result shown either in this course or in a previous one. Steps without a proper justification will not account for credit. 2. Express the following in base 10. Show all the necessary work to obtain your answer. (a) 12345 (b) 101012 (c) 11111 3. a) Convert the base 10 number 54321 to base 6. Show all the necessary work to obtain your answer. b) Convert the base 10 number 100 to base 2. Show all the necessary work to obtain your answer. 4. 6. For each of the following equations, find all integral solutions or show that it has none. Show all the necessary work to obtain your answer. (a) 3x+4y=10 (b) 44x-17y = 9 (c) 60x+9y= 31 (d) 16x + 24y = 44 5. What is the smallest nonzero value of X Y - where x and y are integers? Show all the necessary 136 31 work to obtain your answer. 6. Find the prime factorization of the following integers. Show all the necessary work to obtain your…arrow_forward
- Equilibrium Equations: Two-dimensional 2.28 Ra= Rc= 2.29 (change force to 600N) AC= AB= 2.33 CD= AC= DE= BC= Free Body Diagrams 2.34 Ax= Ay=_ Bx= By= 2.36 Ax= Ay= Bx= By= 2.37 (change middle force to 4000 lbs) Ay=_ Dx= Dy=_ 2.38 (change horizontal force to 2 kN) Ax= Ay= Bx= By=_ 2.40 Ay= By= Dx= 32% Bx= Cy= Dy=arrow_forwardThe expression (w.wx+8) represents the number of miles Trent jogged during a race, and 5x represents the number of miles that Ling jogged during the same race, in x hours. Write and simplified expression to show how many more miles Ling jogged than Trentarrow_forwardFirm Alpha operates in a perfectly competitive market in a constant-cost industry and is earning negative economic profit. a. How does Firm Alpha determine its profit-maximizing quantity of output? Explain. b. Draw correctly labeled side-by-side graphs for Firm Alpha and the market it operates in. Label the axes and all of the following: i. Market price (PE) and market quantity (QE) ii. The firm's quantity of output (Qe) iii. The firm's average total cost (ATC) c. Completely shade the area of the firm's total cost. d. Identify whether the following increase, decrease, or remain constant as the market moves to long-run equilibrium: i. Market equilibrium quantity ii. Market equilibrium price e. Assume the product that Firm Alpha produces has a negative externality. Draw the marginal social cost (MSC) on the market graph from part (b). f. Will the unregulated market produce more or less than the socially optimal quantity? g. Label the socially optimal quantity (Qso) for the market on your…arrow_forward
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