Shop ‘Til You Drop
Jason and his sister Maria went to the store with their aunt. There were 8 items on sale.
$213
$375
$158
$122
$139
$264
$243
$112
About how much more is the horse than the laptop?
about $200
about $400
about $700
Drag the thumbs up to the best estimate.
$213
$375
Jason and Maria each bought one item. Maria’s item cost about $100 more than Jason’s item.
ITEM | PRICE |
| $122 |
| $375 |
| $213 |
| $158 |
ITEM | PRICE |
| $243 |
| $112 |
| $139 |
| $264 |
What pair of objects could Jason and Maria definitely not have bought? How do you know?
ITEM | PRICE |
| $122 |
| $375 |
| $213 |
| $158 |
ITEM | PRICE |
| $243 |
| $112 |
| $139 |
| $264 |
How might we figure out which items
Maria and Jason bought?
ITEM | PRICE |
| $122 |
| $375 |
| $213 |
| $158 |
ITEM | PRICE |
| $243 |
| $112 |
| $139 |
| $264 |
If we guess a pair for Maria and Jason, how could we see if our guess is correct? What if it’s not? How can that information be helpful?
ITEM | PRICE |
| $122 |
| $375 |
| $213 |
| $158 |
ITEM | PRICE |
| $243 |
| $112 |
| $139 |
| $264 |
How could we represent Jason and Maria’s totals on a number line?
ITEM | PRICE |
| $122 |
| $375 |
| $213 |
| $158 |
ITEM | PRICE |
| $243 |
| $112 |
| $139 |
| $264 |
How could we represent Jason and Maria’s totals on a number line?
How does this representation model the problem?
Cost of Jason’s item
?
Cost of Maria’s item
Jason and Maria each bought an item. Maria’s item cost about $100 more than Jason’s item.
Could it be the horse and skateboard?
$375
$158
Let’s prove that it can’t be the
skateboard and horse.
Draw the base ten blocks for the horse.
$375
$158
Compare the hundreds, tens, and ones.
Are these two items about $100 apart in price?
$375
$158
Jason and Maria each bought an item. Maria’s item cost about $100 more than Jason’s item.
Could it be the robot and the guitar?
$139
$112
Draw base ten blocks for the robot’s price.
Compare the two different amounts.
Could it be the robot and the guitar?
$139
$112
Draw base ten blocks for the robot’s price.
Compare the two different amounts.
Could it be the robot and the guitar?
$139
$112
Draw base ten blocks for the skateboard and the pool table. Compare the amount of hundreds, tens, and ones.
Could it be the pool table and the skateboard?
$243
$158
How are you feeling right now on the llama scale?
Jason and Maria each bought an item. Maria’s item cost about $100 more than Jason’s item.
Could it be the horse and the plane?
$375
$264
Jason and Maria each bought an item. Maria’s item cost about $100 more than Jason’s item.
Could it be the pool table and the plane?
$264
$243
Jason and Maria each bought an item. Maria’s item cost about $100 more than Jason’s item.
Could it be the doll house and the laptop?
$213
$122
Jason and Maria each bought an item. Maria’s item cost about $100 more than Jason’s item.
Could it be the robot and the guitar?
$139
$112
Jason and Maria each bought an item. Maria’s item cost about $100 more than Jason’s item.
Could it be the pool table and the skateboard?
$158
$243
Jason and Maria each bought an item. Maria’s item cost about $100 more than Jason’s item.
Could it be the pool table and the plane?
$264
$243
How are you feeling right now on the llama scale?
How did we figure out what pairs of items they could and could not have bought?
Let’s Debrief!
Maria’s item cost about $100 more than Jason’s item.
ITEM | PRICE |
| $122 |
| $375 |
| $213 |
| $158 |
ITEM | PRICE |
| $243 |
| $112 |
| $139 |
| $264 |