Answer: The domain is the 3rd answer
Step-by-step explanation:
a. 69
b. -1
c. 9
d. 59
By using mental math the value of 15/124·230/30÷230/124 is 1/2.
To get better at mental math or metal calculation we can start by practising doing arithmetic operations of two digit numbers.Then after we can go on increasing the digits when we're getting better at it.Thinking of the easiest way to chunks numbers also helps.
According to the given question
{(15/124)×(230/30)}/(230/124)
First the fraction (230/124) which is in the denominator we flip and multiply.
= (15/124)×(230/30)×(124/230)
Now 124 and 124 on numeration and denominator gets cancelled and same case is applicable for 230 then after we are left with 15/30 which is equal to 1/2.
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