What is the correct answer to 20÷2(5+5)?

Sagot :

20 ÷ 2 (5 + 5) = 100.

Further explanation

In the 1500s the specific rules of the order of operation were promptly issued. The order of these workings states which processes take precedence (as a key priority) before which other operations.

Operation priorities are as follows.

  • Brackets/Parentheses (simplify in it)
  • Exponent
  • Multiplication or Division (from left to right)
  • Addition or Subtraction (from left to right)

Let's implement the rule.

[tex]\boxed{ \ 20 \div 2 (5 + 5) = \ ? \ }[/tex]

Add 5 by 5 in parentheses.

[tex]\boxed{ \ 20 \div 2 (10) = \ ? \ }[/tex]

Properly apply rule number 3 from the priority operation above. Initially, we have to divide 20 by 2 which is the result of 10

[tex]\boxed{ \ 10(10) = \ ? \ }[/tex]

Continuing with multiplication 10 by 10.

[tex]\boxed{ \ 10 \times 10 = 100 \ }[/tex]

So, the correct answer is

[tex]\boxed{ \ 20 \div 2 (5 + 5) = 100 \ }[/tex]

Notes:

What is the result if we don't follow operation priorities? Let's see.

At this crucial point.

[tex]\boxed{ \ 20 \div 2 (10) = \ ? \ }[/tex]

We decide to multiply 2 by 10, even though there are no parentheses from them, only parentheses for 10.

[tex]\boxed{ \ 20 \div 2 \times 10 = \ ? \ }[/tex]

[tex]\boxed{ \ 20 \div 20 = 1 \ }[/tex]

Therefore, the incorrect answer is

[tex]\boxed{ \ 20 \div 2 (5 + 5) = 1 \ }[/tex]

That's what happens if we don't follow operating priorities.

Unless the problem like this (see the parentheses carefully):  

[tex]\boxed{ \ 20 \div (2 (5 + 5)) = ? \ }[/tex]

[tex]\boxed{ \ 20 \div (2 (10)) = ? \ }[/tex]

[tex]\boxed{ \ 20 \div 20 = 1 \ }[/tex]

Thus, the difference must be considered. Consistently, obey the priority of the operation and look at the problem in detail.

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Keywords: what is the correct answer to, 20 ÷ 2(5 + 5), the order of operation, operation priorities are as follows, parentheses, brackets, simplify, exponent, multiplication, division, from left to right, add, subtract  

Answer:

To answer the question above, we need to know about the rules of mixed count operation. In mixed count operation, we can find plus [+], minus [-], divided [:], multiplication [x] and parenthesis [(...)]. For example, if the operation is: 7 x 5 + 3 - (4 x 3) : 6  = ...

first, we must finish the operation inside the parenthesis symbol, which is (4 x 3), the result is 12

second, we must finish the operation with the multiplication or divided symbol but, if both exist we must finish the far left-side first. for this example is to finish "7 x 5 = 35" first, then finish the next operation with divided symbol "(4 x 3) : 6 = 12 : 6 = 2"

for the last, we finish the operation with plus or minus symbol, but if both exist then we must finish the far left-side first. For this example is to finish "35 + 3 = 38", then finish the next operation which is "38 - 2 = 36".

there are the rules of mixed count operations, to make it clear we finish the example operation step by step

7 x 5 + 3 - (4 x 3) : 6 = ...

7 x 5 + 3 - 12 : 6 = ...

35 + 3 - 12 : 6 = ....

35 + 3 - 2 = ...

38 - 2 = 36.

now the answer to the mixed count operation above 20 : 2 (5 + 5) = ...

20 : 2 x (5 + 5) = ...

20 : 2 x 10 = ...

10 x 10 = 100

the answer of the operation is 100

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Answer Details

Subject: Mathematics

Chapter: Mixed Count Operation

Grade: High School

Keyword: What is the correct answer of 2 2?, How do you explain a math problem?, Do you use Bodmas if there are no Brackets?