Lesson #5 title: PART 5 = Obtaining EXPRESSIONS with one-letter variable or PATTERN RULES from WORD PROBLEMS
Date:
THROUGH-LINE: Creation – enjoying
God created patterns in a logical fashion which uses the four operations (add, subtract, X, and divide).
OUTCOMES:
1. More practice creating TOVs using ‘time patterns’ (months, hour of day).
2. Write a mathematical EXPRESSION or PATTERN RULE to represent a given pattern from a TOV.
MATERIAL NEEDED: highlighters, pencil, blue pen, ruler,
Example #1:
Jacob and Amanda each are saving money. Who has saved the most money by the end of January and
how much MORE money does that person have?
a) Jacob saves $30 in July. He saves $4 each month after that.
PATTERN RULE or EXPRESSION?
b) Amanda saves $22 in July. She saves $6 each month after that.
PATTERN RULE or EXPRESSION?
FINAL ANSWER: So,
has saved the most AND has $
more.
Example #2: Emily saw 2 birds in her backyard on Sunday, 3 birds on Monday, 5 birds on Tuesday, and 8
birds on Wednesday. How many birds would Emily see on Saturday?
EXPRESSION or PATTERN RULE?
FINAL ANSWER:
Example #3: Chloe’s candle is 28 cm high when she lights it at 5 PM. It burns down 4 cm every hour. How
tall is her candle at 10 PM?
FINAL ANSWER:
PATTERN RULE or EXPRESSION?
L5(2)
YOUR TURN 
#1: Allan has $35 in his savings account at the end of March. He spends $7 each month. How much money
does he have left in the account at the end of July?
EXPRESSION or PATTERN RULE?
FINAL ANSWER:
#2: Edith and Rita each are each growing flowers. Whose flower is taller by the end of December and by
how much?
a) Edith’s flower is 5 cm tall in July. It grows 7 cm each month after that.
PATTERN RULE or EXPRESSION?
b) Rita’s flower is 7 cm tall in July. It grows 3 cm each month after that.
PATTERN RULE or EXPRESSION?
FINAL ANSWER: So,
‘s flower is taller and by
cm.
#3: The snow is 19 cm deep at 3 PM. It snows 5 cm every hour. How deep is the snow at 7 PM?
PATTERN RULE or EXPRESSION?
FINAL ANSWER:
#4: Mrs. Winter had 100 pencils. Every week she gave 10 pencils to her students. How many pencils did
she have left after 8 weeks?
EXPRESSION:
FINAL ANSWER:
L5(3)
#5: the rule is
th
Start at 72 and subtract 7 each time. What is the 6 number? Write the number sequence, draw the
arrows and show the pattern.
PATTERN RULE or EXPRESSION?
FINAL ANSWER:
#6: Using this number sequence, find the next 4 numbers. Draw the arrows and show the pattern.
21, 27, 33, 39
PATTERN RULE or EXPRESSION?
FINAL ANSWER:
#7:Using this number sequence, find the 7th number. Draw the arrows and show the pattern.
110, 99, 88, 77
PATTERN RULE or EXPRESSION?
FINAL ANSWER:
#8:
On Monday, Julie bought 10 candies and ate 3 of them.
The next day, she bought 12 candies and ate 6 of them.
The following day she bought 14 candies and ate 9 of them.
If this pattern continues, how many candies would Judy buy and eat on Friday?
HINT: DRAW a VERTICAL TOV and insert this data.
PATTERN RULE or EXPRESSION?
FINAL ANSWER: