Fact Fluency
The sum of 64 and 45 is ___.
23 + 45= 68
What is an unknown?
A. A number we need to find
B. A number that is always zero
C. A number we already know
A.
An unknown is a number we need to find.
When you have to solve a word problem the first step is always to ______.
What To Do When You See a Word Problem
1. _______
1. Read the problem carefully
👉 Read it once to understand the story. 👉 Read it again to find the math.
Find the unknown
12 + __ = 20
The unknown is 8.
12 + _8_ = 20
Mia has 24 beads. She has 13 fewer beads than Leo.
CHOOSE the matching equation that will answer:
How many beads does Leo have?
A 24 − 13 = ? B 24 + 13 = ?
C ? + 13 = 24 D 24 + 24 = ?
B 24 + 13 = ?
Add the difference to Mia's beads to get Leo's amount of beads.
The difference of 64 and 45 is ___.
64-45= 21
“The shop sold a hat.” What happened?
A. The shop bought a hat.
B. The shop kept the hat.
C. Someone paid the shop to buy the hat.
C. Someone paid the shop to buy the hat.
Write TWO details we need to circle in the word problem:
Ivan has 35 cookies. Dilan has 14 cookies. How many cookies do they have in all?
1._____
2._____
1.35 cookies
2.14 cookies
Step 3. Find the important numbers and their sets.
👉 Circle the important details you need. 👉 Ignore numbers you don’t need.
Find the unknown
54 - __ = 20
The unknown is 34.
54 - _34_ = 20
Ben scored 35 points. He scored 14 more than Ana.
CHOOSE the matching equation that will answer:
How many points did Ana score?
A 35 + 14 = ? B ? − 14 = 35
C ? + 14 = 35 D 14 + 14 = ?
C ? + 14 = 35
Ana's score (part) can be added to the difference (part) of their scores to get Ben's higher score (the whole).
The SUM of 34 + 21 + 12 is ____.
34+21+12= 67
“Then” tells us _____.
A. what happened first
B. how many there are in all
C. what happened next
Then tells us C. what happened next.
For step 4. Choose a strategy
What different strategies can you use to add and subtract numbers less than 100? Select THREE choices.
A Draw a picture with Characters
B Place value mat
C Use place value or the algorithm
D Fingers ONLY
E Numberline
B Place value mat
C Use place value or the algorithm
E Numberline
Find the unknown
__ + 12 + 20 = 80
The unknown is 48.
_48_ + 12 + 20 = 80
Lia has 23 stickers. She buys some more. Now she has 40.
How many stickers did Lia buy?
Which equation matches the story?
A 23 + 40 = ? B 23 − ? = 40
C 23 + ? = 40 D ? − 23 = 40
C 23 + ? = 40
There is a missing ____.
The difference of 100 and 72 is _______.
100-72= 28
When we need to compare in a word problem that has adjectives like fewer than or more than we usually have to use _________ to solve the word problem.
A. Subtraction
B. Addition
C. Subtraction and/or Addition
C. Subtraction and/or Addition
JUSTIFY and CHECK the work below. ✓✓✓✓✓✓✓
57 + 23 = 70
57 + 23 = 80
Extra points 100:
What could have been the mistake in 57 + 23 = 70 ?
Find the unknown
12 + 46 + __ = 90
The unknown is 32.
12 + 46 + _32_ = 90
Which number story matches this equation?
? + 12 = 35
A Lily has 12 cards. She gets 35 more. How many cards does she have now?
B Lily had some cards. She got 12 more. Now she has 35. How many cards did she have at first?
C Lily had some cards. She gave 12 away. Now she has 35. How many cards did she have at first?
B Lily had some cards. She got 12 more. Now she has 35. How many cards did she have at first?
She is adding more cards.
Find the missing number.
23+ ___ = 45
The missing number is _______.
23+ 22 = 45
Compare:
14 and 30
_____ has ____ more than _____
_____ has ____ fewer than _____
__30___ has __16_more than __14___
__14___ has __16_fewer than ___30__
What is the MOST important step to solving a word problem?
1. Read the problem carefully
2. Ask: What is happening?
3. Find the important numbers
4. Choose a strategy
5. Solve and check
Teachers EYES
Find the unknown:
63 + 12 + 10 = ___
The unknown is 85.
63 + 12 + 10 = _85__
A class needs 60 books.
Families give 24 books. Teachers give 13 books.
How many more books does the class need?
A 24 + 13 = ? and 60 − 37 = ?
B 24 + 13 = ? and 60 − 24 = ?
C 24 − 13 = ? and 60 − 11 = ?
D 24 + 13 = ? and 60 + 37 = ?
A 24 + 13 = ? and 60 − 37 = ?
First we add the books given.
Then we find the difference of what they need and what they have.