Making Predictions Strategy for 1st Grade Addition & Subtraction

Learn how to make predictions about math problems with visual aids, step-by-step instructions, and practice exercises.

Making Predictions Strategy Exercises & Solutions
1 Predicting Addition Results
Exercise 1
Predict: Will 5 + 3 be more than 7 or less than 7?
Definition:

Prediction: Using what you know to guess the answer before calculating

Method:
  1. Look at the numbers
  2. Think about how big the answer might be
  3. Compare to the given number
5
+
3
?
7
Prediction Process
Step 1: 5 + 3 means we start with 5 and add 3 more
Step 2: Adding 3 to 5 will make the number bigger
Step 3: Since 5 + 3 = 8, and 8 > 7, the answer is MORE than 7
1
Look at numbers
2
Think about size
3
Compare to 7
Step 1: Analyze the problem

We need to predict if 5 + 3 is more or less than 7

Step 2: Make the prediction

Adding 3 to 5 will make a number bigger than 5

Step 3: Verify the prediction

5 + 3 = 8, and 8 is more than 7

5 + 3 is MORE than 7
Final answer:

5 + 3 will be more than 7

Applied rules:

• Reasoning: Adding makes numbers bigger

• Comparison: Compare predicted result to target

• Verification: Check prediction by calculating

2 Predicting Subtraction Results
Exercise 2
Predict: Will 9 - 4 be more than 4 or less than 4?
Definition:

Subtraction prediction: Guessing if the result will be greater or lesser than a given number

9
-
4
?
4
Prediction Process
Step 1: 9 - 4 means we start with 9 and take away 4
Step 2: Taking away 4 from 9 will make the number smaller
Step 3: Since 9 - 4 = 5, and 5 > 4, the answer is MORE than 4
Step 1: Analyze the problem

We need to predict if 9 - 4 is more or less than 4

Step 2: Make the prediction

Taking away 4 from 9 will make a number smaller than 9, but still bigger than 4

Step 3: Verify the prediction

9 - 4 = 5, and 5 is more than 4

1
Analyze
2
Predict
3
Verify
9 - 4 is MORE than 4
Final answer:

9 - 4 will be more than 4

Applied rules:

• Reasoning: Subtraction makes numbers smaller

• Comparison: Compare predicted result to target

• Verification: Check prediction by calculating

3 Predicting with Number Sense
Exercise 3
Predict: Will 6 + 2 be closer to 5 or 10?
Definition:

Number sense prediction: Using understanding of number relationships to estimate

6
+
2
?
5 or 10
Prediction Process
Step 1: 6 + 2 means we start with 6 and add 2 more
Step 2: Adding 2 to 6 gives us 8
Step 3: Since 8 is closer to 10 than to 5, the answer is CLOSER to 10
Step 1: Analyze the problem

We need to predict if 6 + 2 is closer to 5 or 10

Step 2: Make the prediction

6 + 2 = 8, and 8 is 3 units from 5 but only 2 units from 10

Step 3: Verify the prediction

6 + 2 = 8, and 8 is closer to 10 than to 5

1
Analyze
2
Predict
3
Verify
6 + 2 is CLOSER to 10
Final answer:

6 + 2 will be closer to 10

Applied rules:

• Estimation: Use number sense to predict results

• Distance: Compare how far the result is from targets

• Verification: Check prediction by calculating

Making Predictions Strategy Overview
Prediction Strategy Steps
Step 1: Look at the numbers and operation
Step 2: Think about what the operation does to the numbers
Step 3: Make an educated guess about the result
Step 4: Verify your prediction by calculating
Addition Predictions
Adding makes numbers bigger, so the result will be larger than the starting number
Example: 5 + 3 will be more than 5
Subtraction Predictions
Subtracting makes numbers smaller, so the result will be smaller than the starting number
Example: 9 - 4 will be less than 9
Estimation Predictions
Use number sense to estimate where the result will fall
Example: 6 + 2 is closer to 10 than to 5
🔍
Analyze
🤔
Predict
✅
Verify
🎯
Refine
5
→
6
→
7
→
8
→
9
→
10
Key benefits:

Number sense: Builds understanding of number relationships

Reasoning: Develops logical thinking skills

Estimation: Improves approximation abilities

When to use prediction:
  1. Before calculating: Estimate the answer
  2. Checking work: Verify if answers make sense
  3. Word problems: Predict reasonable outcomes
  4. Mental math: Develop estimation skills
Tip 1: Use number lines to visualize the operation.
Tip 2: Think about whether the answer should be bigger or smaller.
Tip 3: Always verify your predictions by calculating.
Prediction Strategy Concepts & Properties
Prediction = Analysis + Reasoning + Estimation
Mathematical Reasoning
Definition:

Prediction strategy: Using mathematical reasoning to estimate the result of an operation before calculating it

Analysis: Looking at the numbers and operation.
Reasoning: Thinking about what the operation does.
Estimation: Making an educated guess about the result.
Verification: Checking predictions by calculating.
Teaching strategies:
  1. Modeling: Demonstrate the prediction process
  2. Guided practice: Work through examples together
  3. Independent practice: Let students make predictions
  4. Verification: Always check predictions
Key principles:

• Addition: Makes numbers bigger

• Subtraction: Makes numbers smaller

• Estimation: Uses number sense to predict

• Verification: Always check predictions

Common mistake: Forgetting to verify predictions.
Practice tip: Use manipulatives to visualize operations.
Practice Activities & Tips
Practice Builds Fluency!
Prediction Strategy Development
Practice activities:

Prediction games: Make guesses before calculating

Number line walks: Visualize operations

Real-world scenarios: Predict outcomes in daily situations

Learning progression:
  1. Simple addition: Predict if results are more or less
  2. Simple subtraction: Make similar predictions
  3. Estimation: Predict closest numbers
  4. Verification: Check all predictions
Tip 1: Practice 5-10 minutes daily for consistent improvement.
Tip 2: Use number lines to visualize operations.
Tip 3: Always verify predictions by calculating.
Tip 4: Ask yourself: "Does this prediction make sense?"
Assessment: Students should predict accurately and verify results.
Connection: Prediction skills support all mathematical operations.
Common core alignment:

• 1.OA.1: Use addition and subtraction within 20 to solve word problems.

• 1.OA.6: Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.

• 1.NBT.4: Add within 100, including adding a two-digit number and a one-digit number.

Detailed Summary & Key Takeaways
Key Concepts:

Prediction strategy: Using analysis and reasoning to estimate results before calculating

Addition predictions: Results are typically larger than starting numbers

Subtraction predictions: Results are typically smaller than starting numbers

Verification: Always check predictions by performing the calculation

Core Rules & Principles:
  1. Analysis: Look at the numbers and operation carefully
  2. Reasoning: Think about what the operation does to the numbers
  3. Estimation: Make an educated guess about the result
  4. Verification: Always check predictions by calculating
Examples (simple → advanced): Predict 5+3>7, then 9-4>4, then 6+2 closer to 5 or 10
Memorization tip: Addition makes bigger, subtraction makes smaller
Common pitfall: Forgetting to verify predictions by calculating
Application: Prediction skills support all mathematical operations
Long-term benefits:

• Number sense: Better understanding of number relationships

• Reasoning: Improved logical thinking skills

• Estimation: Stronger approximation abilities

• Foundation: Supports all future math learning

Questions & Answers

Question: How can I help my child practice making predictions about math problems at home?

Answer: Here are effective home practice strategies:

  • Ask first: Before calculating, ask "Do you think the answer will be bigger or smaller?"
  • Number lines: Use number lines to visualize operations
  • Real-world examples: Use daily situations for prediction practice
  • Verification: Always have your child check predictions by calculating

Start with simple addition and subtraction problems.

Question: Why is making predictions important for 1st grade students?

Answer: Making predictions is important because it:

  • Builds number sense: Helps students understand number relationships
  • Develops reasoning: Teaches logical thinking skills
  • Improves estimation: Strengthens approximation abilities
  • Supports accuracy: Helps catch errors by checking if answers make sense

It's foundational for all future mathematical concepts.

Question: What if a student struggles with making predictions?

Answer: For students struggling with predictions:

  • Use concrete materials: Counters or manipulatives to model problems
  • Slow the pace: Focus on one operation at a time
  • Visual aids: Use number lines or ten frames
  • Extra practice: More repetition with basic facts

Some students need more time to develop number sense and reasoning skills.