how to be a math detective 1. read the story. reread the question carefully to understand what the...
TRANSCRIPT
How to be a MATH Detective
1. Read the story. Reread the question carefully to understand what the problem asks.
2. Underline or highlight key words for clues.
3. Cross out irrelevant/unnecessary information.
4. Use a strategy: (Draw a picture, show an operation, remember a rhyme, etc).
5. Solve the problem.
Order the Numbers
Ian lays four number cards in a row, but they’re all scrambled. He wants to put them in order from greatest to least.
The numbers are
1,032; 1,009; 1,201; 999.
Help Ian put the numbers in order.
Place ValueMake a place value chart.
The number below is mixed up. Put the digits in the correct place value.
Eight hundred, Three, Nine thousand, Sixty.
Answer: 9,863
SUM Means to ADDAbout Means to Estimate
Our class held a cookie baking contest. Jasmine made 293 cookies. Daniel made 376 cookies, Find the sum of the cookies Jasmine and Daniel have. About how many cookies did they have together?`
Look for key clue words.Reread the question to understand
what it is asking.
Ashlynn collected 567 aluminum cans and 476 newspapers to recycle. She has 247 plastic bottles that can be recycled as well. About how many more cans did she recycle than bottles?
What’s the question asking?
About how many more cans did she recycle than bottles?
Underline the question.
Look for key clue words.Reread the question to understand
what it is asking.
Ashlynn collected 567 aluminum cans and 476 newspapers to recycle. She has 247 plastic bottles that can be recycled as well. About how many more cans did she recycle than bottles?
Any Key Words?
The words About, More than, & And are the key clue words.
About means to estimate or round the numbers.
More than means to subtract.
And means to add.Highlight these words.Now reread the question
carefully.
Look for key clue words.Reread the question to understand
what it is asking.
Ashlynn collected 567 aluminum cans and 476 newspapers to recycle. She has 247 plastic bottles that can be recycled as well. About how many more cans did she recycle than bottles?
What do you & don’t you need to know?
Need to Know, Relevant, Necessary:
567 aluminum cans
247 plastic bottles
how many more cans
than bottles
Highlight these words.
Don’t Need to Know, Irrelevant, Unnecessary:
and 476 newspapers
Cross this out!
Look for key clue words.Reread the question to understand
what it is asking.
Ashlynn collected 567 aluminum cans and 476 newspapers to recycle. She has 247 plastic bottles that can be recycled as well. About how many more cans did she recycle than bottles?
What are the key words for this problem?
The words About & More than are the key clue words.
About means to estimate or round the numbers. Round 232 & 157.
More than means to subtract.
Now reread the question carefully.
Ashlynn collected 567 aluminum cans and 247 plastic bottles to
recycle. She has 476 newspapers that can be recycled as well.
About how many more cans did she recycle than bottles?
Things to look for:Look for key clue
words.Reread the question
to understand what it is asking.
Mackenzie made a cake using Mackenzie made a cake using M& M’s and cookies. She used M& M’s and cookies. She used 234 M&M’s and 479 cookies. 234 M&M’s and 479 cookies. About how many cookies and About how many cookies and
M&M’s did she use?M&M’s did she use?
479 - - - - - > 500479 - - - - - > 500
+ + 234234 - - - - - > + - - - - - > +200200
Mr. V has 562 comic books and 378 toys. About how many comics and toys does he have?
Mr. V has about ______ comics & toys.
NFL Facts
In the 2008 NFL season Ben Roethlisberger threw for 3,301 yards. Peyton Manning threw for 4,002 yards. About how many more yards did Peyton throw than Ben?
Peyton threw about ______ more yards than Ben.
About how many?
There are 452 pages to read in Daniel’s AR book. He read 305 pages. If you estimate to the nearest ten, about how many more pages does he have left?
Ethan earned $40 more dollars than Makayla washing cars.
Together they have $140. How much did they each earn?
Predict (Mak.) Ethan Total Notes
Estimate the Difference
Payton is shopping for shoes. She found a pair of sandals for $89. She also looked at a pair of boots for $217 and jogging shoes for $120. About how much more do the boots cost than the sandals?
Estimate the Difference
JB played in three football games. In the first game he ran for 216 yards. In the second game he ran for 187 yards. In the last game he ran for 371 yards. About how many more yards did he run in the 3rd game than the 1st?
Estimate the Difference
Ian is flying around the world in a plane he invented. He flew 473 miles on the first day. On the second day he flew 696 miles. And on the third day he flew 822 miles. About how many more miles did he fly on day three than day one?
Clayton makes 177 toys on the weekend. He makes 15 more on Sunday than on Saturday. How many toys does he make
each day?
Predict (Sat.) Sunday Total Notes
Estimate the Difference
Quin won two prizes. The 1st prize was $725 and the 2nd prize was $903. About how much more did he win on his 2nd prize?
Estimate the Difference
John was in a pizza making contest. He made 645 pizzas on Monday and 871 pizzas Tuesday. About how many more pizzas did he make on Tues. than Mon.?
John made about ______ more pizzas on Tues. than Mon.
Estimate the SUM
The BFG ate 147 snozzcumbers and 652 plates of breakfast at the Queen’s palace. About how much did he eat in all?
The BFG ate about _______ in all.
Predict & Test
Two numbers have a sum of 39. Their difference is 11. What are the two numbers?
Predict ( ) _______ Total Notes
Find the ProductJosie is making cheeseburgers for a
party. There will be six tables to serve. Each table will have four guests. How many cheeseburgers will Josie need to make for her guests. Draw a grouping problem.
Find the Product
Blake shared Halloween candy with three other people. Each person received three pieces of candy. How much candy was there to begin with? Show a grouping problem.
Find the Product
Daniel is battling Storm Troopers. He comes across six groups of eight Storm Troopers. Then he battles three groups of nine Storm Troopers. How many more Storm Troopers did he battle in the first group? Show an array for each battle.
Find the Product
Daniel is battling Storm Troopers. He comes across six groups of eight Storm Troopers. Then he battles three groups of nine Storm Troopers. How many more Storm Troopers did he battle in the first group? Show an array for each battle.
Find the Product
Ethan wrestled three groups of two people in a handicap match and won. Michael wrestled three groups of three people in a cage match and won. Draw an array for each match. ___________.
Josh has 42 more baseball cards than hockey cards. Josh has 136 hockey cards. Which number sentence shows that B is equal to the number of baseball cards?
A. 136 divided by 2 = B
B. 136 subtract 42 = B
C. 136 times 42 = B
D. 136 plus 42 = B
Brooke saves dimes, nickels, and quarters. She has 290 dimes, 132 nickels, and 65 quarters. About how many coins does Brooke have in all?
A. 300
B. 400
C. 500
D. 600
Make a Model
Zach jogged 2/3 a mile, Riley jogged 5/6 a mile, and Jace jogged 4/12 of a mile. Put these people in order from greatest to least by distance of their run.
Find the number sentence
The band director marches in rows of 6 musicians. The band director wants to find the number of rows that there will be with the 54 band members. Which number sentence shows that v equals the number of rows? Show a picture to match.
A. 6 + v = 54B. 54 – 6 = vC. 54 + 6 = vD. 54 divided by 6 = v
Combinations
Riley is going to the Prince’s Ball. She can wear a crown made of diamonds or a crown made of emeralds. She has a golden dress, diamond dress, and a ruby dress. Use a tree diagram to show all the combinations of outfits Riley can wear.
Riley has ______ combinations.
Make a Model to Solve
Jason spent 3/6 of his money on wrestling magazines. He spent 2/3 on video games. Did he spend more on magazines, video games, or are these equivalent?
Make a Model
Jace is counting comic books. He has 4/6 of Spiderman comics and 4/12 of superman comics. Which does he have the most of?
Make a Model
Ian ate 8/5 of a cake. Draw Circles & Divide them into 5 pieces. What is the MIXED FRACTION? LOOK AT YOUR PICTURE.
Make a Model
KH created a pie. She saw 9/3. Draw a picture to show this Improper Fraction.
Write the MIXED FRACTION.
Make a Model
Sabrina raced 15/6 motorcycles. Draw a picture & divide it into 6 pieces. Write the MIXED FRACTION.
Make a Model
Mitchell sold 10/4 cards. Draw a picture to show this IMPROPER FRACTION. Write the MIXED FRACTION.
Make A Model
Skylar has 7 2/6 of toys. Make a model and divide it into ____ pieces.
Make a Model
JJ is making a model to show 7/2. Draw a picture to match. DIVIDE it into 2 parts. What is the MIXED FRACTION?
Make a Model
Josie has 15/3 cookies & Mackenzie has 16/4 cookies. Make a model for each person. Who has more?
Make a Model
Saylor has 7/3. JB has 6/2. Draw a model for each.
Make a Model
Catie saw 3 ½ brownies sitting on a table. If all the pieces were cut into fourths, how many pieces of brownies were there?
