# How can you calculate error using the plus or minus symbol ie. 1.5655 plus or minus 3?

1.5655 is your starting value, you need to both subtract and add 3 to that value to determine your range.

1.5655-3= -1.4345

1.5655+3= 4.5655

so your range is -1.4345 to 4.5655

### When setting an Excel formula what is the word used when subtracting one column from another?

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