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## A Mathematics Lesson Starter Of The Day

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• Jake, Patana
•
• I have found 1+2+3+4+5+6+7+8x9 = 100
• Lewis Crosby, Doncaster
•
• I have found one too 198-73-26+5-4=100
• Sarah, Maidenhead
•
• Another solution for this is 56+49-2-3+8-7-1=100
• Katrina, Maidenhead
•
• I have got found another solution for this starter =
6x7x2+8-3+1+9-4+5
• Holly, Whitby High, Ellesmere Port
•
• Another Solution: (5x6)+(4x9)+(8x3)+7+2+1 = 100
• Reece & Ashlee, Ellesmere Port
•
• Two more solutions without brackets from Whitby High:

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

69+31+8+5-7-4-2 = 100
• James Wellington-Smith, Lea Moor High
•
• 231-(9x8)-(6x5)-7-4
• Mr Heeley's Krew, Rawthorpe in da Hudd of field
•
• 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
• Year 6, BIS Jakarta
•
• 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 11- Mr Kelly's class, Cross and Passion College
•
• We found another solution for ALL FOR 100

98+7-6+5-4+3-2-1=100
• Giovanni Fernandez, The British School of Quito, Ecuador
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• 2 x (7 x 8 x 9 - 456) + 3 + 1
• Tim Channer, The British School of Quito, Ecuador
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• (9 x 8) + (7 x 6) - (5 x 4) + (3 x 2 x 1)
• Montae, Mrs. Shelburne's Period 3/6 class, Hayward Middle School, Springfield, Ohio
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• 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
• Ashleigh Reid, S2 Lochend Community High School
•
• I found this way of getting the answer:

92 + 6 + 3 - 4 + 5 - 1 + 7 - 8
• Ciaran Donegan, Harrytown High School, Stockport, 8H
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• I found (51+4+3) x 2 -9-8 + 7 -6
• Mrs Simpson, Torry Academy, Aberdeen
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• 2D1 Maths Class at Torry Acadmey found this way:

89+7+6-5+(2*3)-4+1
• Andy Rowe, Knowles Hill School Devon
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• Cameron Houdmont in Year 7 got this one

(7 + 3) x 9 + 5 + 4 + 1 + 8 - 6 - 2
• Ms Winters, Dubai English Speaking College
•
• 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)
• Miss Train, Saints Peter and Paul
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• 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
• Jodie, Lauren, Hayley, Harrytown High School Stockport
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• 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
• Jack Houghton, Sydney, Australia
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• I got 123+45-67+8-9
• Martin Vaughn, Central Sussex college haywards heath
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• 8x9 +7 +1 +5 +6 +4 +3 +2 =100
• Jonathan, Holland Road
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• the answer is
12+34+59-6+8-7
• Miss Mian, Bishop Ramsey School, Ruislip
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• 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
• Josh Atkin, Dunbar Grammar
•
• The answer is
(98-7) +1 -4 +6 -2 +3+5=100
•

• Mark Daniels, Wissahickon Middle School
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• 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)
• Mrs Simpson and class 4M4, Torry Academy, Aberdeen
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• Vincent found 963-852-7-4x1
Emma found 6x9x2-8+4+1-3+5-7
Shelby found 9x6+34+7+8-5+2x1
Jasmine found 9x7+(6x8)-5-4-3-1+2
• Liam Hutchison, Lochend Community High School in Glasgow
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• I calculated it this way

(9x7) + 6 + 1 + (5 x 2) + (4 x 3) + 8
• Ellen Moore, KNGS, Birmingham,UK
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• This works!
(9+1)-(2+8)+(3+7)+(4+6)*5=100
• Miss Samantha Rhodes, Filsham Valley school, Hastings
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• In 1 class, I had 5 different correct solutions.
8x9+67+1-45+2+3 =100 (Charlotte Avery, year 8)
5x19+34-28-7+6=100 (Sam Davies, year 8)
3x4x6+2x9+(8-7+1)x5=100 (Sophie Fairall, year 8)
8x9+1+2+3+4+5+6+7=100 (Charlotte Rudd, year 8)
156-78+29-3-4=100 (James Bisson, year 8)
• Mr Jordan Fry, Laurence Jackson School, Guisbrough
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• We got 5*9=45, 45+7=52, 52*2=104, 104-6=98, 98+4=102, 102-3=99, 99+1=100
• Emma, Lockerbie Academy
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• 78+24+9-6-5+3-2-1=100
• Soumya, Croydon
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• 1+8x9+2+7+6+5+3-4=100.
• Form 7Y, Harrytown Catholic High School, Stockport
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• Amy Booth found 9x8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 100
James Wilson (9x8) + 7 + 6 + 5 + (4 x 3) - (2 X 1) = 100.
• Miss Marcham And 10f1, Prince Henry's High School, Evesham
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• We got (6+4)x(8+9-7+5-3-2)x1 = 100.
• Mrs J A Thompson, Mexborough School Specialist Science College
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• Two different answers were found in 10 minutes. 7P SPECTRUM group
The first was 1 + 2 + 3 + 4 + 5 +6 + 7 + (8x9) = 100 by Ashley Finney
and (1+7+2) x 9 + 8 + (4x5)- (3x6) = 100 by Emma Rodgers.
• Mitchel, Brocket
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• Another way of doing it is
9-1=8, 8-2=6,7-3=4, 6-4=2, then
8+6+4+2=20x5=100.
• Y Ramsamy, Phoenix College, Reading, UK
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• My pupils came up with the following solutions:
(124-3-5-6-8-9)+7 = 100 Ryan Walsh
(5x7x2x1)+3+4+6+8+9 = 100 Moin Khan
Y Ramsamy
Phoenix College, Reading, UK
• Jerry & Tom, Fukien School (HK)
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• (1+2x3x4)x5-6*7+8+9=100.
• Thomas, Cabrach
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• This wasn't easy but I found
9x8+7+(6x4)-5+1+3-2=100.
• Grade 12 Advanced Functions, Port Hope High School, Ontario, Canada
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• Connor found 4x5x6-7-8-9-1+2+3
Brandon found 24x5-9-8-7+6+1-3
Brandon found 9x8+1+2+3+4+5+6+7.
• Mrs Barnett & 8x1, Bredon Hill Middle School, Evesham
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• Our simplest answer was (9x8)+7+6+5+4+3+2+1 = 100.
• Greg Patko Yr8, Murray Park, Derby
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• (9+8) x 7 - 6 x 5 + 4 x 3 + 1 - 2
(1 + 9 + 2 + 8 + 3 + 7 - 6 - 4) x 5.
• Mike Drewniak, Kewaskum Middle School
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• Dinara found: 91+82-67-5-4+3.
• Beacon Community College, Crowborough, 8XMa3
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• (6+4)x9+7+3+1+2+5-8=100.
• David Clowes, St Peter's Academy
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• I got 7x5x4-9x3-8-6+2-1.
• Max, Hethersett Junior
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• 12x5+39+6-8+7-4=100.
• 9 (the Better Half) 1, Chellaston Academy, Derbyshire
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• Anneli and Molly: 9(6+3)+1+8+7+2+(5-4)
May: 2(6x9-3-1+8-5-7+4)
Rhys: 7x9+4x3+5+6x2+8x1
David: 1(932-845)+6+7
Eve: 5x6+87+1-9-4-3-2
Ashley: 9x8+7+6+5+4x3-2x1.
• 7ax1, Alexandra Park School, London
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• Susie, Vinesha and Tommy : 8 x 9 + 7 + 1 + 6 + 5 + 4 + 2 + 3 = 100
Semi (1 + 2 + 3 + 4 + 5) x 6 + (8 + 9) - 7 = 100
Kira and Simon 341 - 265 + 9 + 7 + 8 = 100
Ben 91 + 7 + 2 + 5 + 8 - 3 - 4 - 6 = 100
Seb 123 - 45 - 67 + 89 = 100
Lottie 8 x 9 x 2 - (4 x 5) - (6 x 3) - 7 + 1 = 100
Peter (1 + 2 + 3) x 6 - 7 - 5 - 8 + 9 x 4 = 100.
• Australia Class, Cottam, Preston, England
•
• Our class found 2 ways to solve this puzzle:
8x9=72+(5x4)=92+(7+1)=100-6=94+2x3=100
The next idea is:2+8= 10X9=90+5=95+6=101+4=105+3=108-1=107-7=100.
•

• RM, UK
•
• I have found: 1 x 7 x 9 + 2 x 6 + 4 x 5 + 8 + 3 = 100.
• Abi T, St Peter's Y6 Maths Group
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• (9x8)x1 +6 +7 + (5x4)- (3+2).
• Miss Brook, Crick Primary School
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• William - Year 6 - 9x8=72 + 5x6 - 7 - 2 - + 3 + 4 x 1
Ethan - Year 6 - 7x9 x 2 - 8 - 6 - 5 - 3 - 4 x 1.
• Taeh, Croydon
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• I found out that you can do 8x9 which equals 72 and then you add 7+6+5+4+3+2+1=28 then 28 and 72 equals 100.
• Sophie Tune, Kingswinford England
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• I got 1+2+3+4+5x7(105)-6+9-8.
• Matthew Zhao, 4AD, Craigslea State School
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• Matthew Zhao here, coming with with a personal answer in two minutes!
47*2+1+3+6+9-8-5=100.
(P.S. I'm in Grade Four).
• Mr Macready, Jersey
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• Sarah here in Jersey Year 8.1 came up with (93+7)+(8x6)-45-2-1
Some of the others came up with answers like 99.2, which aren't 100 last time I checked!
• Gurdev Rayet, Holyheadschool
•
• I found 9x8+7+6+5+4+3+2+1 which makes 100.
• Mr. Van, Sweden
•
• We did it!
• Shaa, India
•
• It's really cool, do you want to see more?

_ _ +_ _+_ _ = _ _+ _=100

Fill in the blanks with the numbers from 1 to 9 without repeating.

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## Answers

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## Have you read Craig's book yet?

Craig Barton must surely be the voice of Mathematics teachers in the UK. His wonderful podcasts interviewing the industry experts have culminated in this wonderful book. As Craig says: "I genuinely believe I have never taught mathematics better, and my students have never learned more. I just wish I had known all of this twelve years ago..." more...

"How I wish I'd taught Maths" is an extraordinary and important book. Part guide to research, part memoir, part survival handbook, it’s a wonderfully accessible guide to the latest research on teaching mathematics, presented in a disarmingly honest and readable way. I know of no other book that presents as much usable research evidence on the dos and don’ts of mathematics teaching in such a clear and practical way. No matter how long you have been doing it, if you teach mathematics—from primary school to university—this book is for you." Dylan Wiliam, Emeritus Professor of Educational Assessment, UCL.

## Casio Classwiz Calculator

There is currently a lot of talk about this new calculator being the best in its price range for use in the Maths classroom. The new ClassWiz features a high-resolution display making it easier to view numerical formulas and symbols but it isn't a graphical calculator as such (it has the capacity to draw graphs on your smart phone or tablet, via a scannable QR code and an app).

As well as basic spreadsheet mode and an equation solving feature you also get the ability to solve quadratic, cubic or quartic polynomial inequalities and the answer is given just as it should be written down, using the correct inequality symbols!

This calculator has a high-performance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more...

 Teacher, do your students have access to computers?Do they have iPads or Laptops in Lessons? Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Here a concise URL for a version of this page without the comments.

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## Extension Activity

Use the digits zero to nine to make the first ten digits (one at a time!)

## Extension Answers

Here are the solutions to the extension challenge as published in 'A Scrap-Book of Elementary Mathematics' in 1908:

For Students:

For All:

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