All For 100

A Maths Starter of The Day

Can you write an expression for 100 which uses all the digits 1 to 9?

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Keywords: Starter | Arithmetic

"I have found 1+2+3+4+5+6+7+8x9 = 100"

Jake, Patana
Thursday, October 05, 2006

 

"I have found one too 198-73-26+5-4=100"

Lewis Crosby, Doncaster
Sunday, October 29, 2006

 

"Another solution for this is 56+49-2-3+8-7-1=100"

Sarah, Maidenhead
Tuesday, November 21, 2006

 

"I have got found another solution for this starter =
6x7x2+8-3+1+9-4+5"

Katrina, Maidenhead
Tuesday, November 21, 2006

 

"Another Solution: (5x6)+(4x9)+(8x3)+7+2+1 = 100"

Holly, Whitby High, Ellesmere Port
Thursday, May 03, 2007

 

"Two more solutions without brackets from Whitby High:

123-4-5-6-7+8-9 = 100

69+31+8+5-7-4-2 = 100"

Reece & Ashlee, Ellesmere Port
Friday, May 04, 2007

 

"231-(9x8)-(6x5)-7-4"

James Wellington-Smith, Lea Moor High
Monday, May 07, 2007

 

"We found (1+9+2+8) x 5 + (3+7) - (4+6).

We think that this is the best answer because simplicity is the key!

Cushtie - please, please, please, please, please put us on the site.

God bless you - Maths rocks"

Mr Heeley's Krew, Rawthorpe in da Hudd of field
Monday, October 01, 2007

 

"We found many solutions including
9 * 4 * 2 + 8 + 7 + 3 + 5 + 6 - 1 = 100
9 * 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 100
9 * 8 + 4 * 7 - 5 * 2 + 6 + 3 + 1 = 100"

Year 6, BIS Jakarta
Tuesday, October 02, 2007

 

"We found another solution for ALL FOR 100

98+7-6+5-4+3-2-1=100"

Year 11- Mr Kelly's class, Cross and Passion College
Wednesday, October 03, 2007

 

"2 x (7 x 8 x 9 - 456) + 3 + 1"

Giovanni Fernandez, The British School of Quito, Ecuador
Wednesday, October 03, 2007

 

"(9 x 8) + (7 x 6) - (5 x 4) + (3 x 2 x 1)"

Tim Channer, The British School of Quito, Ecuador
Wednesday, October 03, 2007

 

"Here is Montae's solution...he found it in less than 5 minutes and creatively used exponents!

5^2 x 4 - 9 + 6 + 3 - 7 + 8 - 1"

Montae, Mrs. Shelburne's Period 3/6 class, Hayward Middle School, Springfield, Ohio
Thursday, October 04, 2007

 

"I found this way of getting the answer:

92 + 6 + 3 - 4 + 5 - 1 + 7 - 8"

Ashleigh Reid, S2 Lochend Community High School
Friday, October 05, 2007

 

"I found (51+4+3) x 2 -9-8 + 7 -6"

Ciaran Donegan, Harrytown High School, Stockport, 8H
Friday, October 05, 2007

 

"2D1 Maths Class at Torry Acadmey found this way:

89+7+6-5+(2*3)-4+1"

Mrs Simpson, Torry Academy, Aberdeen
Friday, October 05, 2007

 

"Cameron Houdmont in Year 7 got this one

(7 + 3) x 9 + 5 + 4 + 1 + 8 - 6 - 2"

Andy Rowe, Knowles Hill School Devon
Friday, October 05, 2007

 

"Here are our answers from class 7DE...

9x8+1+2+3+4+5+6+7

6x3x5+12+4+(9-8)-7

9x8+7+1+5x6-(4x3-2)"

Ms Winters, Dubai English Speaking College
Sunday, October 07, 2007

 

"The first to get it in my class was Emma M in under 20 seconds - here's her solution:
[(1+2+3+4) x 9] + 5 + 6 + 7 - 8 = 100"

Miss Train, Saints Peter and Paul
Sunday, October 07, 2007

 

"123+45-67+8-9 Jodie Reilly 9T
98-7-6+5+4+3+2+1 Lauren Hill 9W
(1+2+3+4+5)x6-7+8+9 Hayley Ryder 9H"

Jodie, Lauren, Hayley, Harrytown High School Stockport
Monday, October 08, 2007

 

"I got 123+45-67+8-9"

Jack Houghton, Sydney, Australia
Wednesday, October 10, 2007

 

"8x9 +7 +1 +5 +6 +4 +3 +2 =100"

Martin Vaughn, Central Sussex college haywards heath
Thursday, November 08, 2007

 

"the answer is
12+34+59-6+8-7"

Jonathan, Holland Road
Friday, February 22, 2008

 

"Daniela got the total by doing
68 + 23 + 15 -4 +7 - 9

and Amy got it by doing

(9x8) + 1 + 2 + 3 + 4 + 5 + 6 + 7"

Miss Mian, Bishop Ramsey School, Ruislip
Thursday, March 13, 2008

 

"The answer is
(98-7) +1 -4 +6 -2 +3+5=100"

Josh Atkin, Dunbar Grammar
Wednesday, March 19, 2008

 

"Nicole from Mr. Daniels' Pre-Alg. Support class,WMS, Ambler,PA did this-
4(5+7+8) + 1(2+3+6+9)

Mr. Daniels offered this-
2^5 + (8x9-4) + 13-(6+7)"

Mark Daniels, Wissahickon Middle School
Thursday, May 22, 2008

 

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This starter has scored a mean of 3.6 out of 5 based on 41 votes.
 

  

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