Unknown Numbers in Addition, Subtraction, Multiplication, Division; Number Line and Sequences

1. Problem of the Day
Simon sees seven dots on three faces of a
standard number cube (dice). Find the number
of dots on the faces he cannot see.

2. Unknown Numbers
in Addition, Subtraction,
Multiplication,
Division
Lesson 3

3. Answers to WP 2
2. $0.04; 4 cents 16. 27
4. subtraction 18. $37.50
6. 5x3=15, 3x5=15, . . . 20. 2639
8. $5.21 22. 56,000
10. $3.75 24. 120
12. $4.37 26. $13.50
14. 207 28. 15, 54, 6, 21
30. dividend/
divisor=quotient

4. LN 3: Unknown Numbers
How do you use what you
know to find out what you
don’t know?
Thinking Blocks

5. LN 3: Unknown Numbers
Vocabulary
equation

6. LN 3: Unknown Numbers
If we have an addition equation, how do you find
an unknown?
If we have an subtraction equation, how do you
find an unknown?
If we have an multiplication equation, how do you
find an unknown?
If we have an division equation, how do you find
an unknown?

7. LN 3: Unknown Numbers
Find the unknown in the equations:
x + 53 = 75
x - 24 = 17
3y = 24
x/5 = 7

8. Number Line and Sequences
Lesson 4

9. Vocabulary
compare
comparison symbol
geometric sequence
integers
negative numbers
number line
origin
perfect squares
positive numbers
sequence
terms

10. Did You Know.....
Like God, the number line also has no formal beginning,
because there are an infinite number of negative numbers that
are smaller than zero, just as there are also an infinite number of
fractions between zero and one.
In the same way that God Himself is without end, so too is there
no formal end to the number line.

11. Number Line and Sequences
Sketch a number line on your paper showing the origin, tick
marks, and integers. Plot the points corresponding to the
numbers 0, 1, -2, -5 on the number line.
What will always be true when you plot numbers on a number
line?
Show 4 + 1 on a number line.
Show 2 - 6 on a number line.

12. Number Line and Sequences
What is the rule for this sequence: 1, 4, 9, 16, ...? Find the next
three terms in the sequence.
Using five terms, show an arithmetic sequence.
Using five terms, show a geometric sequence.
Using the rule k = 3n, find the first four terms.

13. Practice/Homework
Use digits and other symbols to write “The sum of 2 and 3 is less than the product
of 2 and 3.”
Replace the square with the proper comparison symbol:
3-4☐4-3
Simplify: 436 - 630
Use words to describe the rule of the following sequence. Then find the next three
terms: 1, 2, 4, 8, ...
The rule of a certain sequence is k = (2n) - 1. Find the first four terms of the
sequence.

14. Practice/Homework
Use digits and other symbols to write “The sum of 2 and 3 is less than the product
of 2 and 3.”
Replace the square with the proper comparison symbol:
3-4☐4-3
Simplify: 436 - 630
Use words to describe the rule of the following sequence. Then find the next three
terms: 1, 2, 4, 8, ...
The rule of a certain sequence is k = (2n) - 1. Find the first four terms of the
sequence.
Homework: page 30 (1-30 evens)