Practice Set · Part 1
Math is Finding Patterns
Pick up where we left off
Where we left off
Our goal: I can find patterns and pattern rules, use them to make generalizations, and check my solutions with a table of values, explain why the method works, and use it on a problem I have not seen before.
The big idea: Patterns let you find an unknown amount and then check it, because here the pennies must always be a multiple of 5.
Model to copy — Example · Find the missing pennies
- A jar has $53.50. It has 180 quarters, 70 dimes, and 20 nickels. The rest of the coins are pennies. How many pennies are in the jar?
- Find the value of the quarters: 180 × $0.25 = $45.00
- Find the value of the dimes and nickels: 70 × $0.10 = $7.00; 20 × $0.05 = $1.00
- Add the three values: $45.00 + $7.00 + $1.00 = $53.00
- Subtract from the total to find the pennies: $53.50 − $53.00 = $0.50 → 50 pennies
- There are 50 pennies in the jar.
Start here
You did these with your group. Now do them on your own — the model above is yours to copy.
- 1
Same stepsFinish what the group started. Use the model above, step for step.
Try it together — then prove it: Try 200 quarters, 25 dimes, 15 nickels, and 25 pennies. Do they make exactly $53.50? Then explain the pennies. What are 200 quarters and 25 dimes worth? ($50.00 + $2.50 = $52.50) What are 15 nickels and 25 pennies worth? ($0.75 + $0.25 = $1.00) What is the total? ($52.50 + $1.00 = $53.50) Why must the number of pennies be a multiple of 5? (Quarters, dimes, and nickels make a multiple of 5 cents, and so does $53.50. The pennies fill the rest, so they make a multiple of 5 too.)Show your work - 2
Warm restartWhich box holds more — one that holds 20 cubic inches, or one that holds 30 cubic inches?
- AThe 20 cubic inch box
- BThe 30 cubic inch box
- CThey hold the same
- DYou cannot tell
How do you know?
- 3
Warm restartA cube is 2 cm long on every edge. What is its volume?
- A4 cubic cm
- B6 cubic cm
- C8 cubic cm
- D12 cubic cm
How do you know?
- 4
Warm restartA box is 2 cm long, 3 cm wide, and 2 cm tall. What is its volume?
- A7 cubic cm
- B10 cubic cm
- C12 cubic cm
- D24 cubic cm
How do you know?
Practice Set · Part 2
Math is Finding Patterns
Keep going
You answered these out loud. Now write them.
Answer, then say how you know — the reason is the part that counts.
- 5
Think it throughPlayer A had scored 18 points before making 10 two-pointers in a row. Using the pattern rule of adding 2 points per shot, what is Player A's final score?
- A20
- B28
- C36
- D38
Why is that the answer?
- 6
Think it throughPlayer B had 6 points before scoring 10 three-pointers in a row. Using the pattern rule of adding 3 points per shot, what is Player B's final score?
- A16
- B30
- C36
- D38
How do you know? Give a second reason as well.
- 7
Think it throughAfter using the pattern rules to find both players' final scores, how can the players check that their totals are reasonable?
- AMultiply the two final scores together
- BRound both totals to the nearest ten
- CList the score after each shot in a table of values and confirm the sequence lands on the final totals
- DCompare the players' shooting percentages
Explain your thinking. What would have to change for a different choice to be right?
- 8
Back to the modelAkela's change jar has coins worth $53.50. Why is 'every 100 of a coin is worth 100 times one coin's value' a pattern, while 'Akela's jar holds $53.50' is not?
Sort it again — on paper this time
Write the letter of the group each one belongs in.
- Each number in Player A's points is 2 greater than the number before it.
- The pattern rule for Player B is to add 3.
- Every 100 of a coin is worth 100 times one coin's value.
- The number of pennies in the jar must be a multiple of 5.
- Player A had 18 points before the streak started.
- Akela's jar holds $53.50.
- Player B finished with 36 points.
- A sei whale measures 4.5 meters long at birth.
Practice Set · Part 3
Math is Finding Patterns
Words and reasoning
Word bank · Banco de palabras
Use the words
Fill each blank with a word from the bank.
- Something that repeats or changes in a predictable way is a ___.
- The instruction for getting from one term to the next is the ___ ___.
- A statement true for a whole pattern, not just the cases you tried, is a ___.
- A table listing each step of a pattern in order is a ___ ___ ___.
Explain the thinking
- 9
Find the mistakeAnother student made this exact mistake in this lesson. Explain why it is wrong, then write what they should have done.
The mistake: Reporting only the points from the streak (20 or 30) and forgetting to add the points each player had before the streak began. - 10
Say moreThe whale card was tricky: 'a sei whale measures 4.5 meters at birth' is a starting value, and the growth pattern adds about 2.5 centimeters each day. Why does a pattern need BOTH a starting value and a rule?
- 11
Write your ownWrite your own problem about this situation, then solve it and show the answer. The situation: Rows of shoes fill a set of shoe racks. Nobody wants to count them one at a time.
Show your work
Practice Set · Part 4
Math is Finding Patterns
Show what you know
Last check
These two come from Lesson 1.4. If they are shaky, that is the lesson to revisit — not this one.
- 12
Show what you knowExplain your thinking — Which statement best captures what this lesson means by 'Math is Finding Patterns'?
- AWe look for patterns and relationships, use them to solve problems and make generalizations, and check our solutions for reasonableness
- BPatterns are decorations that make problems look nicer
- CA pattern rule only works if you also count every item one at a time
- DOnce you spot a pattern you never need to check your answer
Explain your choice.
- 13
From Lesson 1.4Explain your thinking — Which statement best captures what this lesson means by 'Math is Explaining and Sharing'?
- AWe communicate our reasoning, listen to classmates' arguments, decide whether they are convincing, and check our calculations for accuracy
- BWe keep our methods private so nobody can copy our answers
- CAn argument only counts in math if it uses equations
- DOnce you have an answer, checking it a second way is a waste of time
How do you know?
- 14
From Lesson 1.4The group decides to decompose the garden bed design into simpler shapes to find its volume. What does that method involve?
- ABreaking the figure into rectangular prisms, finding each prism's volume, then adding them
- BAdding the areas of each face of the figure
- CMultiplying the total length by the total width only
- DAveraging the volumes of similar containers they've seen before
How do you know?
Be honest — this tells your teacher what to do next
| I can… | Not yet | Getting there | Got it |
|---|---|---|---|
| I can find patterns and pattern rules, use them to make generalizations, and check my solutions with a table of values, explain why the method works, and use it on a problem I have not seen before. | |||
| I can explain why it works: Patterns let you find an unknown amount and then check it… | |||
| I can justify my answer to a skeptic and connect it to a second strategy or representation. |
One question I want to ask my group next time