Question

State the value and type of each expression.
1. Math.abs(-5)-Math.abs(-7)
2.Math.abs(-1e-1) + Math.abs(-2e-2)
3.Math.sqrt(0.0064)
4.Math.sqrt(Math.pow(2.7, 2)
5.Math.round(3.499)

Answer 1

Answer:

1. 5-7=-2

2.

3.0.08

4.

5.4.0

Answer 2

Answer:

1. Math.abs(-5)-Math.abs(-7)  ⇒ -2

2.Math.abs(-1e-1) + Math.abs(-2e-2)  ⇒ 0.08

3.Math.sqrt(0.0064)   ⇒  0.08

4.Math.sqrt(Math.pow(2.7, 2)  ⇒  7.290000000000001

5.Math.round(3.499)   ⇒    4.0

Explanation:

To understand these expressions, first, you must know the functions that are used in these:

abs() function:

abs stand for absolute value. It finds out the absolute value of the number and returns it. It can be used with negative and complex numbers.

Example: abs(-5) = 5

sqrt() function:

sqrt() function is used to find out the square root of the number. This is the same as finding the square root in our maths class.

For example math.sqrt(4) = 2

pow() function:

pow stands for power. It is used to calculate the power of the number.

for example: math.pow(2,3) = 2³ = 8

round() function

This is used to round off the number. It returns the round-off figure.

For example: math.round(4.98) = 5.0

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