Word problem that equals 100: A word problem where the final answer is 100 or where 100 is one of the given values
- Read the problem carefully
- Identify the known and unknown values
- Determine the operation needed
- Set up the equation
- Solve the equation
- Verify the answer equals 100
Sarah starts with 45 stickers
Her friend gives her some more stickers
Sarah ends with 100 stickers
We need to find how many stickers her friend gave
Known: Sarah started with 45 stickers
Known: Sarah ended with 100 stickers
Unknown: How many stickers her friend gave
45 + ? = 100
To find ?, we subtract: 100 - 45 = ?
100 - 45 = 55
45 + 55 = 100 ✓
Her friend gave her 55 stickers.
Her friend gave her 55 stickers.
• Missing addend: When you know the sum and one addend, subtract to find the missing addend
• Verification: Always check that your answer makes the equation true
• Context: Always answer in the context of the problem
Sarah started with: 45 stickers
Sarah ended with: 100 stickers
Unknown: Friend's stickers
45 + ? = 100
? = 100 - 45
? = 55
45 + 55 = 100 ✓
Answer is correct!
Subtraction word problem equal to 100: A word problem where 100 is the starting amount and subtraction is used to find the difference
The library started with 100 books
Some books were borrowed (unknown amount)
Now there are 38 books left
We need to find how many books were borrowed
Known: Started with 100 books
Known: 38 books left
Unknown: How many books were borrowed
100 - ? = 38
To find ?, we subtract: 100 - 38 = ?
100 - 38 = 62
100 - 62 = 38 ✓
62 books were borrowed.
62 books were borrowed.
• Missing subtrahend: When you know the minuend and difference, subtract to find the subtrahend
• Verification: Always check that your answer makes the equation true
• Context: Always answer in the context of the problem
Started with: 100 books
Left: 38 books
Unknown: Borrowed books
100 - ? = 38
? = 100 - 38
? = 62
100 - 62 = 38 ✓
Answer is correct!
Addition word problem that equals 100: A word problem where adding the given amounts results in 100
Tom collected 36 seashells on Monday
Tom collected 64 seashells on Tuesday
We need to find the total number of seashells
Monday: 36 seashells
Tuesday: 64 seashells
Since Tom collected seashells on both days, we add them together
Equation: 36 + 64 = ?
36 + 64 = 100
36 + 64 = 100 ✓
Tom collected 100 seashells in total.
Tom collected 100 seashells in total.
• Addition: When combining amounts, add them together
• Verification: Always check that your answer makes sense
• Context: Always answer in the context of the problem
Monday: 36 seashells
Tuesday: 64 seashells
Keywords: "collected", "total"
Operation: Addition
Equation: 36 + 64
36 + 64 = 100
Tom collected 100 seashells
Word problem equal to 100: A real-life situation described in words where the final answer or one of the given values is 100
Missing addend: When you know the sum (100) and one addend, find the missing addend by subtracting
Missing subtrahend: When you know the minuend (100) and the difference, find the subtrahend by subtracting
Verification: Checking that your answer makes the equation true
- Read carefully: Understand the situation described
- Identify values: Find all the numbers mentioned
- Determine operation: Decide if you need addition or subtraction
- Find unknown: Determine what value is missing
- Set up equation: Write the mathematical expression
- Solve: Calculate the answer
- Verify: Check that the answer equals 100 when appropriate
- Answer in context: Write the answer in relation to the original problem
• Missing addend: If A + ? = 100, then ? = 100 - A
• Missing subtrahend: If 100 - ? = B, then ? = 100 - B
• Verification: Always check that your answer makes the equation true
• Context: Always answer in the context of the original problem
"Tom has 35 marbles. He needs 100 marbles to fill his jar. How many more does he need?" → 35 + ? = 100 → ? = 65
"A store had 100 pencils. Now there are 43 left. How many were sold?" → 100 - ? = 43 → ? = 57
"Sarah collected 48 leaves and 52 flowers. How many items did she collect?" → 48 + 52 = 100
Multi-step word problem equal to 100: A word problem that requires multiple operations to solve, where 100 is the starting amount
The bakery started with 100 cupcakes
They sold some in the morning (unknown amount)
After morning sales: 27 cupcakes left
They sold 15 more in the afternoon
We need to find morning sales
After morning sales, there were 27 cupcakes
Before afternoon sales, there were 27 + 15 = 42 cupcakes
Started with: 100 cupcakes
Left after morning: 42 cupcakes
Morning sales: 100 - 42 = 58 cupcakes
Start: 100
After morning: 100 - 58 = 42
After afternoon: 42 - 15 = 27 ✓
They sold 58 cupcakes in the morning.
They sold 58 cupcakes in the morning.
• Multi-step reasoning: Work backwards when needed
• Verification: Check that your answer works through all steps
• Context: Always answer in the context of the problem
Bakery made: 100 cupcakes
After morning: 27 left
Before afternoon: 27 + 15 = 42
Morning sales: 100 - 42 = 58
42 - 15 = 27 left
Answer verified!
Comparison word problem equal to 100: A word problem that compares two quantities where one is 100 and the other is found through subtraction
Emma has 100 stickers
Ben has 43 fewer stickers than Emma
We need to find how many stickers Ben has
Ben has FEWER stickers than Emma
So we subtract from Emma's amount
Ben's stickers = Emma's stickers - 43
Ben's stickers = 100 - 43
100 - 43 = 57
Emma: 100, Ben: 57
100 - 57 = 43 (Ben has 43 fewer) ✓
Ben has 57 stickers.
Ben has 57 stickers.
• Comparison: "Fewer" indicates subtraction
• Relationship: When comparing, subtract the difference from the larger amount
• Context: Always answer in the context of the problem
Emma has: 100 stickers
Ben has: 43 fewer than Emma
Keywords: "fewer than"
Operation: Subtraction
Equation: 100 - 43
100 - 43 = 57
Ben has 57 stickers