Week 04 · Divide by two-digit numbers
Thursday
The acorn bags
// Estimate, divide in chunks and check
⏱ about 15 min
Thursday: The acorn bags
Chris the Coyote settles by the campfire ring and opens his satchel.
"One autumn, Samantha gathered exactly 1,000 acorns," he begins.
"She packed them into bags that hold 24 acorns each."
"She filled 41 bags all the way, but 16 acorns were left over."
"Those leftover acorns are the remainder," Chris explains.
"Samantha did not want to waste a single acorn."
"So she used one more bag for the extras, which made 42 bags in all."
Everyone cheers for clever Samantha.
Learn it: what to do with a remainder
1,000 ÷ 24 is 41 with 16 left over, because 41 × 24 = 984.
And 984 + 16 = 1,000.
Read the question to decide what the answer is.
How many full bags? 41. How many left over? 16. How many bags for all? 42.
QUESTIONS ABOUT THE STORY
- Read the question.
- Tap your answer.
Samantha packs 1,000 acorns into bags of 24. How many bags are full?How many acorns are left over?
How many bags does she need for all the acorns?
More story problems
SOLVE THE STORY
- Read the question.
- Tap your answer.
Hazel has 850 seeds. She puts 32 in each row. How many full rows can she plant?
How many of Hazel's 850 seeds are left after the full rows?
130 hikers ride in vans that hold 12 each. How many vans do they need?
Bennie shares 700 apples equally into 28 baskets. How many apples go in each basket?
WHICH ANSWER FITS?
- Read the question.
- Tap your answer.
A question asks how many bags are needed for all the acorns. What do we do with the remainder?
A question asks how many full boxes we can make. What do we do with the remainder?
Multiply, then add any remainder, to check.
| Sentence | True or false? |
|---|---|
| 41 × 24 + 16 = 1,000 | ? |
| 26 × 32 = 850 | ? |
| 11 × 12 = 130 | ? |
| The remainder is always less than the divisor. | ? |
WHY THIS EXERCISE26 × 32 is 832, and 11 × 12 is 132. Neither is exact.
Try it
Count out 50 small things, like beans or paper clips.
Make groups of 12. How many full groups do you get?
How many are left over? Write it like this: 50 ÷ 12 is 4 with 2 left over.
Make groups of 12. How many full groups do you get?
How many are left over? Write it like this: 50 ÷ 12 is 4 with 2 left over.
Draw Samantha's bags of acorns. Show the extra bag for the leftovers.
What a story! Tomorrow Freddy has a review game.