Week 10 · Measure and convert
Thursday
The beaker puzzle
// Change units, then plot fraction measurements
⏱ about 15 min
Thursday: The beaker puzzle
Chris the Coyote settles by the campfire ring and opens his satchel.
"Tonight's story is about Lizzy's beaker puzzle," he says.
"Lizzy had 8 beakers, all the same size, lined up on a bench."
"Each one held a different amount of pond water for her experiments."
"Some had 1/8 liter, some 1/4, some 1/2, and one had 3/4."
"Lizzy wanted every beaker to hold the same amount."
"So Bennie helped her pour them all together and share the water fairly."
Story: Share the water fairly
Lizzy's beakers in liters: 1/2, 1/8, 3/4, 1/4, 1/2, 1/8, 1/4, 1/2.
First, find the total water. Multiply each amount by its number of X marks, then add.
The total is 3 liters.
Then share it into 8 equal parts: 3 ÷ 8 = 3/8 liter each.
QUESTIONS ABOUT THE STORY
- Read the question.
- Tap your answer.
How many beakers hold 1/2 liter?How much water is in all the 1/8 liter beakers together?
How much water is there in all 8 beakers?
Shared fairly, how much water does each beaker hold?
More measurement stories
SOLVE IN STEPS
- Read the question.
- Tap your answer.
Lizzy walks 1.5 kilometers, then 800 meters more. How many meters in all?
A jug holds 2 liters. Lizzy pours out 3 cups of 250 milliliters. How many milliliters are left?
Bennie has 3 pounds of apples. He packs bags of 8 ounces. How many bags?Use the line plot and the unit facts.
| Sentence | True or false? |
|---|---|
| The total water is 3 liters. | ? |
| Shared fairly, each beaker holds 3/8 liter. | ? |
| Only one beaker holds 3/4 liter. | ? |
| 1.5 kilometers = 150 meters | ? |
WHY THIS EXERCISE1.5 kilometers is 1.5 × 1,000 = 1,500 meters.
Try it
Pour some water into 4 cups of the same size, but not evenly.
Now pour water between the cups until they all look level.
You shared the water fairly, just like Lizzy did!
Now pour water between the cups until they all look level.
You shared the water fairly, just like Lizzy did!
◇ MEASURE AND CONVERT TOGETHER
Each of you picks an object in the room.
Measure it in centimeters.
Change the length to meters and say it out loud.
Whose object is longer? Check by comparing the two numbers.
Measure it in centimeters.
Change the length to meters and say it out loud.
Whose object is longer? Check by comparing the two numbers.
What a puzzle! Tomorrow Freddy hosts a measuring review game.