Complete the Expression: Find the Missing Sign in 5+5□20-10

Expression Comparison with Missing Signs

Choose the correct sign:

5+52010 5+5\Box20-10

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Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Choose the correct sign:

5+52010 5+5\Box20-10

2

Step-by-step solution

To solve this problem, we need to evaluate both sides of the expression 5+52010 5 + 5 \Box 20 - 10 to find the appropriate sign (= = , < < , > > ).

  • Step 1: Calculate the left side of the expression:
    5+5=10 5 + 5 = 10
  • Step 2: Calculate the right side of the expression:
    2010=10 20 - 10 = 10
  • Step 3: Compare the results:
    The left side equals 10 10 and the right side also equals 10 10 .
  • Step 4: Determine the correct sign:
    Since 10=10 10 = 10 , the appropriate sign to use is = = .

Thus, the correct sign that completes the expression 5+52010 5 + 5\Box20 - 10 is = = .

3

Final Answer

= =

Key Points to Remember

Essential concepts to master this topic
  • Rule: Calculate each side separately before comparing values
  • Technique: Simplify 5+5=10 and 20-10=10 step by step
  • Check: Verify both sides equal 10, so 10=10 ✓

Common Mistakes

Avoid these frequent errors
  • Rushing to choose a sign without calculating
    Don't guess the comparison sign without doing the math = wrong answer every time! Students often pick > or < by looking at bigger numbers like 20, but they miss that subtraction changes everything. Always calculate both sides completely first.

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

Should I look at the biggest number to decide the sign?

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No! Don't be fooled by large numbers like 20. You must calculate each side completely before comparing. The operations (addition and subtraction) change the final values.

What order should I do the calculations?

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Follow the order of operations! Do addition and subtraction from left to right. So calculate 5+5 first, then 20-10, then compare the results.

How do I know if I should use =, <, or >?

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After calculating both sides:

  • If left side equals right side, use =
  • If left side is smaller, use <
  • If left side is larger, use >

What if both sides give me the same answer?

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Perfect! When both sides equal the same number (like 10 and 10), the correct sign is =. This means the expressions are equivalent.

Can I work backwards from the answer choices?

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It's better to calculate first, then choose. But if you're unsure, you can test each sign by asking: 'Is 10 = 10?', 'Is 10 < 10?', 'Is 10 > 10?' Only the first one is true!

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