Addition Problem: Calculate 4 Units + 8 Units Total

Basic Addition with Single-Digit Numbers

How many units are there in total if we add 4 units to 8 units?

Remember that the number of units is the sum of the two amounts.

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Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

How many units are there in total if we add 4 units to 8 units?

Remember that the number of units is the sum of the two amounts.

2

Step-by-step solution

To solve this problem, let's follow the steps:

  • Step 1: Identify the numbers that need to be added. In this case, they are 4 4 and 8 8 .
  • Step 2: Apply the addition operation to those numbers: 4+8 4 + 8 .
  • Step 3: Perform the calculation. Adding those numbers gives us: 4+8=12 4 + 8 = 12 .

Therefore, the total number of units when we add 4 units to 8 units is 12\mathbf{12}.

3

Final Answer

12 12

Key Points to Remember

Essential concepts to master this topic
  • Rule: Addition combines quantities to find the total sum
  • Technique: Line up numbers vertically: 4 + 8 = 12
  • Check: Count forward from 4: 5, 6, 7, 8, 9, 10, 11, 12 ✓

Common Mistakes

Avoid these frequent errors
  • Confusing addition with other operations
    Don't subtract or multiply when the problem asks to 'add' or find the 'total' = wrong answer! This happens when students rush and don't read carefully. Always look for key words like 'add', 'sum', 'total', or 'plus'.

Practice Quiz

Test your knowledge with interactive questions

If we have 67 blocks in total, how many blocks will remain if we remove 5 tens and 4 ones?

FAQ

Everything you need to know about this question

What does 'total' mean in math problems?

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Total means the final amount when you add everything together. It's the same as asking for the sum of all the numbers in the problem.

How can I check if 4 + 8 = 12 is correct?

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You can check by counting up: Start at 4, then count 8 more (5, 6, 7, 8, 9, 10, 11, 12). Or use subtraction: 12 - 4 = 8 ✓

Why do we say '4 units + 8 units = 12 units'?

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The word 'units' tells us what we're counting. When adding the same type of things (like units, apples, or books), the answer has the same label.

Is there a faster way to add 4 + 8?

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Yes! You can use mental math tricks: Think of 4 + 8 as 4 + 6 + 2 = 10 + 2 = 12. Or remember that 4 + 8 is the same as 8 + 4.

What if I get confused about which numbers to add?

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Re-read the problem carefully and look for the numbers mentioned. In this case, it clearly states '4 units' and '8 units' - these are your two numbers to add together.

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