math

posted by .

How can you tell whether the sum of two numbers is positive or negative before you add

  • math -

    If both numbers are >0, the sum is positive.
    If both numbers are <0, the sum is negative.

    If there is one + and one - sign, then
    search the number with the bigger magnitude, i.e. choose the bigger number irrespective of the sign. The sign of the number with the bigger magnitude is also the sign of the sum.


    4+5=? both positive, sum is positive
    -4 -6 =? both negative, sum is negative

    231 - 521 =?
    +521 is bigger than +231, and since 521 is negative, so the sum is also negative. (=-290)

    -341 + 425 = ?
    425>341, but 425 is positive, so the sum is also positive (=+84)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    Instructions: Tell whether each expression represents a positive number or a negative number when m and n are negative. problem: -n/-m If both m and n are negative, then both -m and -n (numerator and denominator) are positive. What …
  2. MATH HELPPPP!!!!!

    If the sum is zero, what is the relationship of the two numbers?
  3. Basic Math Help Please?

    find the next two positive and negative angles coterminal with the quadrantal angle. 90 degrees. I am really confused, what would the two positive and two least negative numbers be?
  4. Algebra

    Tell whether the sum is positive, negative, or zero. Explain n is positive and m is negative. n + (-m) is ?
  5. Algebra

    Tell whether the sum is positive, negative, or zero. Explain n is positive and m is negative. n + (-m) is ?
  6. math

    Which statement is true? A.The sum of two positive integers is sometimes positive, sometimes negative. B.The sum of two negative integers is always negative. C.The sum of a positive integer and a negative integer is always positive.
  7. Math

    Can you subtract two negative numbers and get a positive difference?
  8. Math

    Tell whether the difference between the two integers is always, sometimes, or never positive. 1)Two positive integers. Never 2)Two negative integers. Sometimes. 3)A positive integer and a negative integer. Sometimes. 4)A negative integer …
  9. Math

    We are adding positive and negative numbers. The question is State positive or negative or it depends along with my answers. Are these correct?
  10. Math

    Tell whether the sum between the two integers is always, sometimes, or never positive. Two Positive Integers: Sometimes One Positive and one negative integer: Always Is it right?

More Similar Questions