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Addition Algorithms Practice
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Addition Algorithms Practice
📚 Part 1: Understanding Addition Algorithms
1. What is an addition algorithm?
A way to subtract numbers quickly
A step-by-step method for adding numbers
A type of calculator
A multiplication table
2. Why is place value important when adding numbers?
3. When using the vertical-column method, which column do you start with?
Hundreds column
Tens column
Ones column
It doesn't matter
✏️ Part 2: Vertical Addition Practice
4. Set up and solve these addition problems using the vertical-column method. Remember to align the digits by place value!
a) 34 + 25 = _____
b) 47 + 38 = _____
c) 156 + 29 = _____
5. For problem 4b above, estimate your answer by rounding to the nearest 10:
47 rounds to _____ and 38 rounds to _____
So the estimated answer is _____ + _____ = _____
🎯 Part 3: Apply Your Learning
6. Sarah has 67 stickers and her friend gives her 48 more stickers. How many stickers does Sarah have altogether? Show your working using the vertical-column method.
Answer: Sarah has _______ stickers altogether.
7. Explain the steps of the addition algorithm in your own words:
8. Challenge: What happens when the sum in a column is greater than 9? Explain what you need to do.
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