Algebra

posted by .

An operation is commutative if you can change the order of the numbers involved without changing the result. Addition and multiplication are both commutative. Subtraction is not commutative: 2 - 1 is not equal to 1 - 2. So my question is what’s the difference between 2 - 1 and 1 - 2?

  • Algebra -

    2-1=1 and 1-2=-1

  • Algebra -

    2-1 = 1 and 1-2 = -1.
    So the difference is 2.

    If you asking why it is that way, it just IS. It can be deduced logically from how subtraction is defined.

  • Algebra -

    There is no difference between 1-2 and 2-1 if you disregard the + or - in the final answer.

    Sometimes when I do calculations on the calculator and I forget which number is the larger, I will end up with a negative answer. I just remember that the answer should be positive. Look at the equation and you can see if the answer should be + or -.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. MATH

    What is commutative property of addition?
  2. Algebra

    55. Find the range of y = 2x + 1. a. all real numbers b. all positive numbers Not sure.. 67. Name the Property: -2 + (10+1) = (-2 + 10) + 1 a. Commutative Property of Multiplication b. Inverse property of addition c. Commutative Property …
  3. Algebra

    55. Find the range of y = 2x + 1. a. all real numbers b. all positive numbers Not sure.. 67. Name the Property: -2 + (10+1) = (-2 + 10) + 1 a. Commutative Property of Multiplication b. Inverse property of addition c. Commutative Property …
  4. Algebra

    55. Find the range of y = 2x + 1. a. all real numbers b. all positive numbers Not sure.. 67. Name the Property: -2 + (10+1) = (-2 + 10) + 1 a. Commutative Property of Multiplication b. Inverse property of addition c. Commutative Property …
  5. Algebra

    55. Find the range of y = 2x + 1. a. all real numbers b. all positive numbers Not sure.. 67. Name the Property: -2 + (10+1) = (-2 + 10) + 1 a. Commutative Property of Multiplication b. Inverse property of addition c. Commutative Property …
  6. Pre-Algebra: HELP PLEASE

    I'm really bad at these, can someone help me PLEASE?
  7. math

    An eighth-grade student claims she can prove that subtraction of integers is commutative. She points out that if a and b are integers, then a-b = a+ -b. Since addition is commutative, so is subtraction. What is your response?
  8. Algebra Answer Check

    Which property is illustrated by the following statement?
  9. algebra HELP MRS SUE

    which property is illustrated by the statement 8 (-5/6) = (-5/6) 8 Associative property of addition commutative property of multiplication inverse property of multiplication commutative property of addition***
  10. Math

    1. 16y + 0 = 16y Associate Property of Addition Zero Property of Multiplication Commutative Property of Addition Identity Property of Addition 2. d • r = r • d Commutative Property of Multiplication Identity Property of Multiplication …

More Similar Questions