Solve - 15 - -16 - 12 - 21 - 9 - 2-

15 [ 16 12+21÷ ( 9 2 ) ] =15 [ 16 12+21÷ ( 7 ) ] =15 [ 16 12+217 ] =15 [ 16 12+3 ] =15 [ 19 12 ] =15 (7) =8 ...

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Byju's Answer

Standard VI

Mathematics

Order of Operations

Solve : 15 ...

Question

Solve : $15 - [16 - 12 + 21 \div (9 - 2)]$

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Solution

$15 - [16 - 12 + 21 \div (9 - 2)]$

$= 15 - [16 - 12 + 21 \div (7)]$

$= 15 - [16 - 12 + \frac{21}{7}]$

$= 15 - [16 - 12 + 3]$

$= 15 - [19 - 12]$

$= 15 - (7)$

$= 8$

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Q. Solve the following equations:

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8 x - 26 y + 9 z = 1

23 x + 21 y - 15 z = 4

Construct a frequency table for the following ages (in years) of 30 students using equal class intervals, one of them being 9-12, where 12 is not included.
18, 12, 7, 6, 11, 15, 21, 9, 8, 13, 15, 17, 22, 19, 14, 21, 23, 8, 12, 17,15, 6, 18, 23, 22, 16, 9, 21, 11, 16.

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$\begin{matrix} A & B 1. B - C & A . {5, 10, 20} 2. A - C & B . {3, 9, 15, 21} 3. C - (A - B) & C . {3, 6, 9, 12, 18, 21} 4. C \cap (A - B) & D . {15} E . {2, 4, 6, 8, 12, 14, 16} \end{matrix}$

Q. For the following grouped frequency distribution find the mode:

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Solve : 15−[16−12+21÷(9−2)]

15−[16−12+21÷(9−2)]=15−[16−12+21÷(7)]=15−[16−12+217]=15−[16−12+3]=15−[19−12]=15−(7)=8

Solve : $15 - [16 - 12 + 21 \div (9 - 2)]$

$15 - [16 - 12 + 21 \div (9 - 2)]$

$= 15 - [16 - 12 + 21 \div (7)]$

$= 15 - [16 - 12 + \frac{21}{7}]$

$= 15 - [16 - 12 + 3]$

$= 15 - [19 - 12]$

$= 15 - (7)$

$= 8$