An easy explanation why * and / come before + and -
“That’s a bad case of mathology I want you to take three blue pills, four red pills and one yellow pill.”
"Wow that’s a lot of pills" I replied. "Must be a serious condition."
“Let me add that up 3 * Blue + 4 * Red + 1 * Yellow = 8 pills to take.”
Next week I go to the doctor and he says :
“Things are looking better and I want you to take the same but zero yellow pills.”
Try this on your calculator .......
Blue * 3 + Red * 4 + Yellow * 0 is the sum .......
1 * 3 + 1 * 4 + 1 * 0 = ?
Some older calculators will says I don’t have to take any pills now ...... but is that what the what the doctor ment ?
Math rules say that all the multiplications must be done before you start doing any of the additions when you have a mixed sum.
1 * 3 + 1 * 4 + 1 * 0