math

posted by .

I need help teaching my 2nd grader how to come up with the answer. Easy for an adult..difficult to explain to a child.

I am thinking of 2 numbers who sum is 15.
One of the numbers is 9 more than the other. Got the 12 plus 3 part. Help me explain it in its simplest terms

  • math -

    I'd use counters -- like M & Ms or pennies.

  • math -

    That is my thought but how do I pose the question? I took a deck of cards for counters and tried to figure out how to go about it.

  • math -

    THANK YOU by the way!

  • math -

    Put out 15 objects.

    Then have your child take 9 of them away.

    How many are left?

  • math -

    that's not the answer. its how to get her to 12 is 9 more than 3 that equals 15

  • math -

    start with your 15 objects
    take 1 away, the pile left is 14 more than what she took away, and 14-1=13
    take 2 away, the pile left is 13 more than what she took away, and 13-2=11
    take 3 away, the pile left is 12 more than what she took away, and 12-3=9

    ahhh, one is 3, the other is 12


    for yourself:

    x+y = 15
    x-y = 9
    add them
    2x = 24
    x=12 , then y = 3

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math riddle

    nine odd numbers have a sum of 243.find the sum of the first and last numbers in a set of numbers. hint:if three numbers when added equals twelve then represent it by adding n+()n+1. no one cares...durrr....
  2. math

    I am thinking of 3 different whole numbers which have a product of 36. 5 more than the sum of the 3 numbers is a perfect square. what is the sum of my 3 numbers?
  3. math

    problem> mystery numbers: Bob is thinking of 2 numbers their sum is 26. their product is 165. what numbers is bob thinking about?
  4. math URGENT!!!!

    i have a list of 5 different numbers. the sum of 2 of the numbers is 0. the sum of 2 of the numbers is 1. the sum of 2 of the numbers is 2. the sum of 2 of the numbers is 3. the sum of 2 of the numbers is 4.the sum of 2 of the numbers …
  5. math

    the sum of two numbers is 42 their prodcut is 185 what are the two numbers. Need to know how to get the answers for a 5th grader
  6. Math

    My second grader brought home this math problem for which I can find no solution. The sum of two numbers is 21. One number is two more than the other. What are the two numbers?
  7. math

    Consider an equilateral triangle with points located at each vertex and at each midpoint of a side. (See picture.) This problem uses the set of numbers {1, 2, 3, 4, 5, 6}. Place one number at each point. Call the sum of the three numbers …
  8. math

    kathyrn is thinking of four numbers from 1 through 9 with a sum of 18 find the numbers. this is the questions to the answer above.
  9. algebra

    The sum of the two numbers is 71. One of the numbers is 24 less than four times the other number. What are the two numbers I am thinking of?
  10. Math

    1) for any three consecutive numbers, what can you say about odd numbers and even numbers?

More Similar Questions