Arrange the digits 1,2,3,4,5,6,7,8,9 in order from left to right, insert + and – as desired to get 79 ?
Post solution under Leave a reply:
Arrange the digits 1,2,3,4,5,6,7,8,9 in order from left to right, insert + and – as desired to get 79 ?
Post solution under Leave a reply:
1+2+3+4+5+ 6+7+8+9+1+2+3+4+5+6+7-8+9+1+2-3-4-5+6+7-8+9 =79
Permalink123-4+56-7-89
PermalinkMat , well done. How long did it take you?
I had a different solution in mind.
If anyone can find 10 solutions, that person will also get a free app.
And which app would you like?
Permalink1-2+34+56+7-8-9 another one 🙂
PermalinkIt takes 5-10mins 🙂
Huh 10 solutions is possible?
I want to test Calculus with my TI-89 Tit 🙂
Sure it is. Write a little program that finds those. Email us At support@ti89.com please.
Permalink-1-2+34+56-7+8-9
-12-34+56+78-9
1-2+3-4+5-6-7+89
-1+2-3-4-5-6+7+89
-1+2+3-4-5+67+8+9
-1+2+3+4+5+67+8-9
+1-2+3+4+5+67-8+9
-1+2+3+45+6+7+8+9
I think that’s would be ok? 😀
Permalink1-23+4-5+6+7+89
Permalink-1+23-4-5+67+8-9
-1+23+45+6+7+8-9
ti89guru
PermalinkHow you calculate how many possible combination are in this problem? with formul ? 😀
Mat
PermalinkSend an email with your Calc ID under F1 ABOUT to
support@ti89.com