Al P. answered • 03/30/19

Online Mathematics tutor

3 x 5 + 4 - 2 x 2 + 6 - 4 =

Step-by-step:

__3 x 5____ __+ 4 -** 2 x 2 **+ 6 - 4

= ** 15 **+ 4 -

**+ 6 - 4 << Multiplications 3x5 and 2x2 carried out left to right (PEMDAS: multiplication and division come ahead of addition and subtraction, and are carried out as encountered, left to right)**

__4__= 19 - 4 + 6 - 4 << Now just work left to right since its all + and -

= 15 + 6 - 4

= 21 - 4

= 17

You are correct, the correct answer is NOT 15, it is 17

When you have more experience doing this, you will combine a lot of steps and the process will go much faster. Also, you can always add parentheses to make things clearer:

3 x 5 + 4 - 2 x 2 + 6 - 4 = (3 x 5) + 4 - (2 x 2) + 6 - 4 = (15) + 4 - (4) + 6 - 4 = etc...