Question

3.1 × 22 + 6 ÷ 2 - (3.9 + 3.3)

Answer 1

$\sf3.1\times22+6\div2-(3.9+3.3)$

PEMDAS, parenthesis first:

$\sf3.1\times22+6\div2-7.2$

Now multiply:

$\sf68.2+6\div2-7.2$

Divide:

$\sf68.2+3-7.2$

Add:

$\sf71.2-7.2$

Subtract:

$\sf64$

Answer 2

You have to use PEMDAS which is Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. The answer would be 29.9.