Transum Software

Which Operation?

Decide which mathematical operation is required then use it to find the answers.

  Menu   Level 1 Level 2 Multi-step Problems More Arithmetic
No calculator

This is level 1: problems involving numbers generally up to 12. You may not need all of the information given in the question. You can earn a trophy if you get at least 7 questions correct and you do this activity online.

1) After her birthday party Amanda had 5 milk chocolates and 5 plain chocolates left out of 3 boxes. How many chocolates did Amanda have altogether?

Correct Wrong

2) Amelia went for a 8km walk on her 11th birthday but she quickly became tired and travelled the last 5km by bus. How many kilometers did Amelia actually walk?

Correct Wrong

3) In a shop there are 9 vases arranged on 4 shelves. In each vase there were 4 flowers. How many flowers were there altogether?

Correct Wrong

4) Andrew likes to have 2 oranges squeezed to make orange juice every morning. It takes 8 minutes to do the squeezing. How many oranges does Andrew use in a whole week?

Correct Wrong

5) In a class of twenty four pupils there are seven friends who have been given a box of thirty five crayons to share equally between themselves. How many crayons will each of the friends receive?

Correct Wrong

6) Angelina is 8 years old. She is five years older than her brother and six years older than her sister. How old is Angelina's brother?

Correct Wrong

7) Anna scored 9 points in the first round of the quiz. She then scored 10 points in the second round and 5 points in the third round. What was the total number of points Anna scored in all three rounds?

Correct Wrong

8) This week sixty cakes were set out in rows of 5 on a shop counter. Last week they were set out in rows of 10. How many rows were there this week?

Correct Wrong

9) Ariana measured the heights of the three trees in her garden. The heights were 5m, 6m and 9m. What was the difference in heights of the tallest tree and the shortest tree?

Correct Wrong

10) Arianna multiplies one of the numbers in the list below by another number in the list. The answer she got was also a number in the list. What product did Arianna get?


Correct Wrong

This is Which Operation? level 1. You can also try:
Level 2


Try your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help.

When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file.

This 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.

Email address

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 1 February 'Starter of the Day' page by M Chant, Chase Lane School Harwich:

"My year five children look forward to their daily challenge and enjoy the problems as much as I do. A great resource - thanks a million."

Comment recorded on the 28 May 'Starter of the Day' page by L Smith, Colwyn Bay:

"An absolutely brilliant resource. Only recently been discovered but is used daily with all my classes. It is particularly useful when things can be saved for further use. Thank you!"

Each month a newsletter is published containing details of the new additions to the Transum website and a new puzzle of the month.

The newsletter is then duplicated as a podcast which is available on the major delivery networks. You can listen to the podcast while you are commuting, exercising or relaxing.

Transum breaking news is available on Twitter @Transum and if that's not enough there is also a Transum Facebook page.

Featured Activity

Code Cracker

Code Cracker

Learn the basic techniques for cracking codes then practise them using this interactive challenge. There are three levels of difficulty and many different messages to decipher.


There are answers to this exercise but they are available in this space to teachers, tutors and parents who have logged in to their Transum subscription on this computer.

A Transum subscription unlocks the answers to the online exercises, quizzes and puzzles. It also provides the teacher with access to quality external links on each of the Transum Topic pages and the facility to add to the collection themselves.

Subscribers can manage class lists, lesson plans and assessment data in the Class Admin application and have access to reports of the Transum Trophies earned by class members.

If you would like to enjoy ad-free access to the thousands of Transum resources, receive our monthly newsletter, unlock the printable worksheets and see our Maths Lesson Finishers then sign up for a subscription now:


Go Maths

Learning 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 page is an alphabetical list of free activities designed for students in Secondary/High school.

Maths Map

Are you looking for something specific? An exercise to supplement the topic you are studying at school at the moment perhaps. Navigate using our Maths Map to find exercises, puzzles and Maths lesson starters grouped by topic.


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:

Alternatively, if you use Google Classroom, all you have to do is click on the green icon below in order to add this activity to one of your classes.

It may be worth remembering that if should go offline for whatever reason, there are mirror sites at and that contain most of the resources that are available here on

When planning to use technology in your lesson always have a plan B!

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.


©1997-2023 WWW.TRANSUM.ORG

© Transum Mathematics 1997-2023
Scan the QR code below to visit the online version of this activity.

This is a QR Code

Description of Levels



Level 1 - Problems involving numbers generally up to 12

Level 2 - Problems involving numbers generally up to 100

Multi-step Problems - Solve multi-step problems in contexts, deciding which operations and methods to use and why.

More Arithmetic including lesson Starters, visual aids, investigations and self-marking exercises.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

Log in Sign up

Curriculum Reference

See the National Curriculum page for links to related online activities and resources.


Vocabulary for Arithmetic

You may also want to use a calculator to check your working. See Calculator Workout skill ##.

Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly. You can double-click the 'Check' button to make it float at the bottom of your screen.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

Log in Sign up