Homework Help: math

Posted by cristina on Monday, February 4, 2013 at 5:47pm.

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 - Ms. Sue, Monday, February 4, 2013 at 5:52pm
I'd use counters -- like M & Ms or pennies.
math - cristina, Monday, February 4, 2013 at 5:55pm
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 - cristina, Monday, February 4, 2013 at 5:56pm
THANK YOU by the way!
math - Ms. Sue, Monday, February 4, 2013 at 6:03pm
Put out 15 objects.

Then have your child take 9 of them away.

How many are left?
math - cristina, Monday, February 4, 2013 at 6:11pm
that's not the answer. its how to get her to 12 is 9 more than 3 that equals 15
math - Reiny, Monday, February 4, 2013 at 6:29pm
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

Answer this Question

Related Questions

math,help - can someone explain to me also how to do addition with equations. ...
math - First of all I don't just need the answer I need it explained where a...
Math - First of all I don't just need the answer I need it explained where a...
5th grade word problem math - the teacher asked the students to add up all the ...
spelling - my 2nd grader has a spelling word "cultures" and need to ...
math proportions - The remainder is a fraction (remainder/divisor). Why dont you...
math - Ms. Sue are you able to break 3/4ft.= how many inches for a 2nd. grader.
AED 201 - Interview with a Teaching Professional •What are some examples of...
Math - x = 2 , 4 , 6 , 8 y = 18, 34, 50, 66 This is supposed to be a table ...
Help! - I am stumped with a problem we are supposed to help our 4th grader with...

For Further Reading

First Name:
School Subject:
Answer: