Fact Power Review Slides
Grade 2 Math • Unit 3 Review & Practice
Review + Student Practice!
Fact Power Showdown!
Review key strategies, play test-prep games, and solve whiteboard practice challenges together!
1
Concept Review
2
Game Moves
3
Your Turn to Solve!
4
Test Ready!
Grab your whiteboards & markers! Let's Review Together →
1
Fact Triangles & Fact Families
3 numbers make 4 related math facts!
Total at the top!
+, − 13 6 7
Sum (Total): 13 • Parts: 6 and 7
Two Addition Facts (Parts → Total)
6 + 7 = 13
7 + 6 = 13
Two Subtraction Facts (Start with Total!)
13 − 6 = 7
13 − 7 = 6
Test Tip: In subtraction facts, the biggest number (the sum/total) ALWAYS comes first!
2
Playing Salute!
Use the total and one card to find the secret number!
Partner Math Game
The Dealer
🤖
Calls out the Total:
14
Sum of both cards
Maya's Partner
CARD 6
Card on Forehead
Partner's card = 6
Maya's Card
SECRET 8
Maya has an 8!
6 + 8 = 14
How do you explain your thinking? (Two Great Ways!)
Think Subtraction: "I subtracted 6 from 14. 14 − 6 = 8."
Think Addition: "I asked: what plus 6 equals 14? 6 + 8 = 14, so Maya has 8."
3
Subtraction Top-It
Draw two cards and write the subtraction fact!
Marcus's Turn
Marcus pulls these two cards:
Top Card 15
Card 8
Larger Card − Smaller Card
The Subtraction Fact:
15 − 8 = 7
Marcus must subtract the smaller number from the larger number. His difference is 7!
Mental Math Check:
Think: 8 + 7 = 15 (near doubles!) • So 15 − 8 = 7.
Remember for Top-It: The player with the largest difference wins the round! Score: 7 points
4
Solve & Explain Your Strategy
How do you solve tricky subtraction facts in your head?
Explain Your Thinking
Fact A Problem 4a
13 − 5 = 8
Strategy Options:
- • Think Addition: "I know 5 + 8 = 13, so 13 − 5 = 8."
- • Back to 10: "13 − 3 = 10, then 10 − 2 = 8."
Fact B Problem 4b
11 − 7 = 4
Strategy Options:
- • Count Up from 7: "7... 8, 9, 10, 11! That's 4 hops."
- • Think Addition: "7 + 4 = 11, so 11 − 7 = 4."
On the test: Always write down your explanation in a full sentence! Words + Numbers = Full Credit
5
What's My Rule? (In & Out Table)
Apply the rule to every number going in!
Function Machine
The Machine Rule
RULE:
+ 6
Whatever goes IN, add 6 to get what comes OUT!
| IN |
RULE: + 6 |
OUT |
| 4 |
4 + 6 = |
10 |
| 8 |
8 + 6 = |
14 |
| 11 |
11 + 6 = |
17 |
| 24 |
24 + 6 = |
30 |
Notice the pattern: Look at the ones digit! 4 + 6 = 10 • 24 + 6 = 30 (Next ten!) Great mental math!
6
Elena's Strategy: Make a 10!
How did Elena figure out 7 + 5?
Friendly Number 10
The Problem:
7 + 5 = ?
Elena splits 5 into:
3 (to make 10)
2 (leftover)
1
Make 10 first!
7 needs 3 more to reach 10. → 7 + 3 = 10
2
Add the leftover part!
Add the leftover 2 to 10. → 10 + 2 = 12
Final Sum: 7 + 5 = 12
What to write on your test: "Elena took 3 from 5 to make 7 into 10, then added the leftover 2 to get 12."
7
Subtraction Rules: Zero & One
Look out for missing numbers and sneaky patterns!
Find the Missing Box!
Part A Zero Rule
6 − 0 = 6
Subtracting 0 leaves the number unchanged!
Part B One Rule
8 − 1 = 7
To get the neighbor right before (7), you subtract 1!
Part C Missing Start
12 − 0 = 12
If nothing was taken away, you started with 12!
Part D Missing Start
16 − 1 = 15
Work backwards! 15 + 1 = 16. The missing number is 16!
Mystery Box Secret: When the first number is missing in subtraction, ADD the other two numbers! 15 + 1 = 16
Practice Round 1: You Solve It!
Solve these on your whiteboard or paper • No answers given away!
Student Challenge
Problem 1 Fact Triangle
Total is 14. The parts are 9 and ?
Missing part: ?
Write the 4 facts:
• ___ + ___ = ___
• ___ + ___ = ___
• ___ − ___ = ___
• ___ − ___ = ___
Hint: What plus 9 equals 14?
Problem 2 Salute! Game
The dealer says 15. Partner's forehead has 7.
What is YOUR card?
Secret Card = __
Explain your thinking:
"I know my card is ___ because..."
Hint: Think 15 − 7 or 7 + ? = 15!
Problem 3 Subtraction Top-It
You pull card 16 and card 9.
Write your subtraction fact:
___ − ___ = ___
Your score: Difference = _
Hint: Larger card ALWAYS goes first!
Hold up your whiteboards when you have your answers! Round 2 Challenge →
Practice Round 2: You Solve It!
Fill in the missing numbers • Show your work!
Student Challenge
Problem 4 RULE: + 7
Find what comes OUT for each number:
| IN |
Add 7 |
OUT |
| 3 |
3 + 7 = |
? |
| 8 |
8 + 7 = |
? |
| 12 |
12 + 7 = |
? |
| 23 |
23 + 7 = |
? |
Write all 4 OUT numbers on your board!
Problem 5 Make a 10
Solve: 8 + 5 = ?
How would Elena break down 8 + 5?
1 8 needs ? to reach 10.
Split 5 into: ___ + ___
2 8 + ___ = 10
3 10 + ___ = ?
What is the final sum for 8 + 5?
Turn and tell your partner your thinking steps! Final Practice Round →
Practice Round 3: You Solve It!
Solve and be ready to explain your math moves!
Student Challenge
Problem 6 Solve & Explain
14 − 6 = ? Fact A
Explain: Did you Think Addition or Count Back to 10?
12 − 5 = ? Fact B
Explain: Write one full sentence explaining how you solved it!
Be ready to share your sentence with the class!
Problem 7 Mystery Numbers
Find the number that belongs in each [ ? ]:
Part A
9 − 0 = ?
Part B
11 − ? = 10
Part C
? − 0 = 17
Part D
? − 1 = 18
Clue for C & D: Work backwards to find the starting number!
Check all 4 mystery numbers on your board! Ready to Celebrate! →
Unit 3 Fact Strategies
You've Got Fact Power!
You Are Ready for the Test!
Keep these 4 Fact Power rules in mind as you solve:
1
Fact Families
The biggest number always leads subtraction facts.
2
Think Addition
To solve 14 − 6, ask: what + 6 = 14?
3
Make a 10
Break apart numbers to hit friendly 10 first.
4
In & Out Rules
Do the exact same rule to each number in the table.
Take your time, show your work, and double check! 🎉 Good Luck Math Champions! 🎉
