Stepwise SumsArrange the numbers one to nine on the stairs to obtain the given sums. 
Drag the numbers into the yellow cells to make the given horizontal and vertical sums.
Click the 'Check' button when you have finished.
Congratulations!
Claim your trophy by clicking on the red button below.
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This is Stepwise Sums level 8. You can also
try:
Level 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7


Transum.orgThis web site contains over a thousand free mathematical activities for teachers and pupils. Click here to go to the main page which links to all of the resources available. Please contact me if you have any suggestions or questions. 
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Mathematicians are not the people who find Maths easy; they are the people who enjoy how mystifying, puzzling and hard it is. Are you a mathematician? Comment recorded on the 23 September 'Starter of the Day' page by Judy, Chatsmore CHS: "This triangle starter is excellent. I have used it with all of my ks3 and ks4 classes and they are all totally focused when counting the triangles." Comment recorded on the 21 October 'Starter of the Day' page by Mr Trainor And His P7 Class(All Girls), Mercy Primary School, Belfast: "My Primary 7 class in Mercy Primary school, Belfast, look forward to your mental maths starters every morning. The variety of material is interesting and exciting and always engages the teacher and pupils. Keep them coming please." 
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Numeracy"Numeracy is a proficiency which is developed mainly in Mathematics but also in other subjects. It is more than an ability to do basic arithmetic. It involves developing confidence and competence with numbers and measures. It requires understanding of the number system, a repertoire of mathematical techniques, and an inclination and ability to solve quantitative or spatial problems in a range of contexts. Numeracy also demands understanding of the ways in which data are gathered by counting and measuring, and presented in graphs, diagrams, charts and tables." Secondary National Strategy, Mathematics at key stage 3 

Go MathsLearning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths main page links to more activities designed for students in upper Secondary/High school.  
Teachers  
If you found this activity useful don't forget to record it in your scheme of work or learning management system. The short URL, ready to be copied and pasted, is as follows: 
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Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments. 
At first glance, this puzzle seems to be one where there are many different ways the numbers one to nine can be arranged in the yellow cells. There are 362880 different ways of doing this! On closer inspection youâ€™ll see that actually once one number has been placed on the grid you have no choice over where the other numbers could be placed because the totals determine what they should be. Consequently this makes this puzzle much easier that the other number placing puzzles on the Transum website.
This puzzle was inspired by an isomorphic puzzle that appeared in the Grange Academy Mathematics Department Newsletter and looked like this:
The equivalent puzzle is Level 3 of Stepwise Sums.
Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you donâ€™t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.
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