4.6: Homework

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HW 1

Use the set theory definition of addition or subtraction to add or subtract each of the following. Define appropriate sets and show work. Refer back to pages 2 and 3 for addition and pages 41 and 42 for subtraction if you need help getting started.

a. 5 + 3

b. 5 - 4

HW 2

Verify each of the following:

a. 79 > 66 ____

b. 34 < 88 ____

HW 3

State whether each set is closed under addition and/or subtraction of whole numbers. Provide an example if it is closed, or provide a counterexample if it is not closed.

a. {0}

b. {0, 2, 4, ...}

HW 4

Add the following in the system in which the numbers are given. Show work.

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HW 5

Subtract the following in the system in which the numbers are given. Show work.

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For each pair of numbers, add them together. Then subtract the smaller number from the larger number. Show work and check your answer.

HW 6

\(5432_{\text{six}}\) and \(2453_{\text{six}}\)

HW 7

\(5T4_{\text{twelve}}\) and \(387_{\text{twelve}}\)

HW 8

Add 5643 + 7885 using each algorithm from this module. State the method for each.

HW 9

Subtract 3586 from 8204 each algorithm from this module. State the method for each.

HW 10

Write the addition table for Base Four.

HW 11

Someone does the following computation in a certain base, but is making a mistake. What base were they working in and what is the mistake? 132 + 243 = 320. What is the correct answer? Be sure to show work.

HW 12

Someone used the directed vector to do a subtraction problem. What was the subtraction problem used?

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HW 13

Find the answer to the following subtraction problems by using directed vectors on the number line in conjunction with the missing addend approach. Draw the vectors.

a. 10 - 4

b. 6 - 11

HW 14

In what number base or bases between 2 and 13 are each of the following calculations valid?

a. \(\begin{aligned}57 \\ \underline{+ 64} \\ 132\end{aligned}\)

b. \(\begin{aligned}341 \\ \underline{+ 542} \\ 865\end{aligned}\)

c. \(\begin{aligned}101 \\ \underline{+ 111} \\ 212\end{aligned}\)

d. \(\begin{aligned}\text{T}4 \\ \underline{+ 58} \\ 12\text{W}\end{aligned}\)