# [SOLVED] Pairs of integers that add up to 7 (and 17)

• Feb 28th 2009, 01:31 PM
lilly belle
[SOLVED] Pairs of integers that add up to 7 (and 17)
hi please can someone help me just helping my granddaughter with her homework and I don't understand the following......
Find all the pairs of numbers which add up to 7. Find all the pairs of numbers which add up to 17 What do you notice?

Thank you will save Nannie from looking embarrassed. xx
• Feb 28th 2009, 01:40 PM
Mush
Quote:

Originally Posted by lilly belle
hi please can someone help me just helping my granddaughter with her homework and i don't understand the following......
Find all the pairs of numbers which add up to 7.
Find all the pairs of numbers which add up to 17.
What do you notice?

Thank you will save nannie from looking embarrassed. Xx

1+6
2+5
3+4
=7

1+16
2+15
3+14
4+13
5+12
6+11
7+10
8+9
=17

Not sure what you're supposed to notice apart from that fact that if you look at all the pairs that add up to 7, you get all the numbers leading up to 7. 1, 2, 3, 4, 5, 6.

And if you look at those adding up to 17, you get all the numbers prior to 17. 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16.
• Feb 28th 2009, 01:52 PM
lilly belle
thank you so much Mush
(Clapping) Mush, you made that look so simple. Many thanks. My granddaughter is only 7. What am I going to do when she's older(Wondering) Really grateful Lilly Belle x x