Each week I will post a new problem for you to solve on your own or with your family. Post a comment and tell us your answer and how you went about solving the problem.
This weeks problem:
How many addition signs should be put between digits of the number 987654321 and where should we put them to get a total of 99?
Have Fun!
This is Mrs Cope showing the students how to post a comment.
ReplyDeleteMrs Cope
You need 7 addition signs in thes places
ReplyDelete9+8+7 +65+ 4+3+2+1.I worked it out by working out that 9+8+7+6+5+4+3+2+1=45 and then I took away 6 & 5 and that left me with 34. I then added the 65 and it came to a total of 99!
From Billie
I worked out this problem: How many addition signs should we use between the digits 54321 and where should we put them to get the total 60?
ReplyDeleteFrom Billie
Hi,
ReplyDeleteYou need seven addition signs.
The numbers you use are 1,2,3,4,65,7,8 and 9.
Add these up and you get a total of 99!
Alex
Hi Billie,
ReplyDeleteThe answer to your problem is 3 addition signs are needed.
The numbers are 54,3,2 and 1.
Dear Billie
ReplyDeleteThis is how I worked out your problem.
54+3+2+1=60.
cool problem, thankyou! Mia
Hi,
ReplyDeleteIve found another way to solve the problem.
21+43+5+6+7+8+9=99.This uses 6 + signs
From Alex
Hi, your digits are:
ReplyDelete123567.
Where do you put the plus signs in to make a total of 42?
From Alex
Hi, Ive found 3 new answers!
ReplyDelete12,3,4,56,7,8,9
1,23,45,6,7,8,9
1,2,3,4,5,67,8,9
From Alex
I worked my answer out this way. 9+8=17 +7=24 +65=89 +4+3+2+1=99!!!!
ReplyDeleteTry this one...
how many + signs do you need to get 99 from 123456789 and where would they go?
From Mia
I think the sum goes like this
ReplyDelete9+8+7+65+4+3+2+1=99
I figured it out by adding them up in different ways.
First I added them all up, then I added up the first two numbers but that wasn't going to be a big enough number, so then I added up the first three numbers then added the next two numbers on and it worked.
From Camille
I think that Billie's sum goes 54+3+2+1=60.
ReplyDeleteFrom Camille
I disagree with alex's last 3 answers because the order is 987654321 and he uses numbers like 12, 56 and 67 which go up in digits instead of down. If those answers were avaidable to use the number sequence would be 123456789. :-)
ReplyDeleteFrom Billie