Posted by Lisa on Tuesday, October 2, 2012 at 5:57pm.
There are 25 students in Mrs. Roberts 3rd grade class. There are 9 more boys than girls in the class. How many boys and girls are in Mrs. Robert's class?
How can I explain this to my 8yr old in 3rd grade? I've got myself so confused in the process of trying to figure it out that I'm now lost as well.

3rd Grade Math  bobpursley, Tuesday, October 2, 2012 at 6:02pm
Boys and girls=25
but boys is girls+9
so girls+9+girls=25
twice girls+9=25
twice girls=16
girls=8
boys=nine plus eight 
3rd Grade Math  Reiny, Tuesday, October 2, 2012 at 6:08pm
Ahhh, this would be so easy with algebra as was shown by Ms Sue and Shelley, but I guess we can't use algebra for a grade 3
How about making two columns where the two numbers add up to 25 until we see a difference of 9
e.g.
10 15 > difference is 5
9 16 > difference is 7
8 17 > difference is 9 , YEaaahh! 
3rd Grade reading  arianna, Monday, January 13, 2014 at 8:00pm
5x5=25

3rd Grade Math  Gianna, Monday, January 27, 2014 at 6:27pm
I don't understand?

3rd Grade Math  Edwin, Tuesday, February 4, 2014 at 7:40pm
Suppose the teacher says to the class:
"We're going to play a game and to play it we must have exactly the same number of boys as we have girls. So 9 of you boys will have to go to another room while we play this game."
So 9 boys get up and leave the room. That leaves 259 or 16 students in the room, 8 girls and 8 boys. Then after the game is over the 9 boys return. Now there are 8 girls and 8+9 or 17 boys.
Edwin 
3rd Grade Math  tanzia, Wednesday, February 26, 2014 at 5:20pm
20 tiles in 5 rows

3rd Grade Math  samikchya, Sunday, April 6, 2014 at 10:01pm
solve a simpler problem

3rd Grade Math  Jaszmine, Tuesday, May 27, 2014 at 5:48pm
You can tell her to subtract. Enjoy

3rd Grade Math  Elina, Saturday, May 31, 2014 at 7:55pm
get out 25 blocks then pull 9

3rd Grade Math  melissa, Thursday, September 4, 2014 at 7:41pm
title is class collection data week 1

3rd Grade Math  Anonymous, Monday, September 22, 2014 at 5:46pm
Use structure what property of addition is showmen in the following number sentence ?explain.7+(3+5)=(7+3)+5

3rd Grade Math  Aleyna, Wednesday, October 8, 2014 at 3:19pm
Use Trial and error
5+14=19. No 
3rd Grade Math  Angel, Monday, October 20, 2014 at 6:23pm
Its too hard

3rd Grade Math  Krista, Thursday, January 29, 2015 at 6:21am
Start with the idea that some of the students can be paired (boy/girl, boy/girl, boy/girl...
Then ask what (or who) will be left over after the pairing.... 9 boys. So have the child set the 9 boys apart... so instead of pairing 25 students we'll pair....be sure to ask the question rather than just tell... Most 8yrolds will be able to figure out the equation required is 259=16. Help only as needed.
Now we have 16 students that we are going to pair boy/girl, boy/girl... How many pairs. So, with only what prompting is needed, that's how many girls? How many boys? May need a reminder about the 9 set aside before.
Students adds the 8 paired boys with the 9 stag boys = 17. 8 girls. Double check that the boys + girls adds up to the 25...
Yeah! Math isn't so terrible after all.
:D 
3rd Grade Math  Derick, Monday, March 30, 2015 at 4:53pm
259=16 boys. the rest are girls

3rd Grade Math  Emma, Sunday, April 19, 2015 at 5:38pm
there are 16 girls

3rd Grade Math  jeniah, Thursday, April 30, 2015 at 1:47pm
students=25
boys=259=16
boys & girls=16
girls=16 divided 2=8
boys=8+9=17
girls=8
make sure your answer is correct:17+8=25 
3rd Grade Math  sienna, Monday, November 2, 2015 at 8:07pm
15

3rd Grade Math  renee, Tuesday, November 3, 2015 at 7:51pm
how many apples can you dived by 60
in 10 mients 
3rd Grade Science  Kaylee, Sunday, November 22, 2015 at 12:37pm
30

3rd Grade Math  Zayn, Saturday, April 16, 2016 at 11:29pm
Just explain how to use X for him.

3rd Grade Math  emaan, Monday, June 27, 2016 at 4:00pm
16