Question

21- {30÷(4-5-7)}
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Answer 1

Answer:

24.75

Step-by-step explanation:

Hope it will help you ☆☆☆

Answer 2

Step-by-step explanation:

ANSWER:-

$21 - (30 \div (4 - 5 - 7))$

What we need is the concept of BODMAS.

• B - Brackets
• O Of
• D Division
• M Multiplication
• A Addition
• S Subtraction

1. According to this, we must attempt simplification first inside the brackets.
2. According to Algorithms, division first should be attempted.
3. Them multiplication, followed by addition
4. And last , subtraction.

$21 - (30 \div (4 - 12))$

$21 - (30 \div ( - 8))$

$21 - ( \dfrac{30}{ - 8} )$

In continuing with fractions, taking LCM as 8,

$\dfrac{168 + 30}{8}$

$= \dfrac{198}{8}$

In decimals, we have:-

$21 - ( - 3.75)$

$= 21 + 3.75$

$= 24.75$

is the answer.