Question

Evaluate the expression. Write fractions in the simplest form.

$-4.2+8.1\times (-1.9)$

Answer 1

PEMDAS rule states that the order of operation starts with the parentheses first or the calculation which is enclosed in brackets. Then the operation is performed on exponents(degree or square roots) and later we do operations on multiplication & division and at last addition and subtraction.

$=-4.2+8.1\times (-1.9)$

Using PEMDAS, we will do the multiplication first

$-4.2+8.1\times (-1.9)$ $=-4.2-15.39$

As there is only subtraction left, we will do subtraction next

$-4.2+8.1\times (-1.9)$$=-19.59$

Hence, the final answer is $-19.59$