What do you know about numbers in the 5 times table? What do you know about numbers in the 10 times table?

How might that row/column heading help us now? (For example, 25 has to be 5x5.) Key questionsĪre there any row or column headings you know straightaway? Why? Use time at the end of the lesson to discuss which numbers are particularly helpful and why. As they work, listen out for examples of high quality reasoning which you could then share in a plenary. Learners can then use the interactivity themselves in pairs, either at computers or using tablets.

Give pairs time to talk to each other about where they might start and gradually fill in the headings as a whole group, ensuring that you demand clear reasoning from everyone. Establish the set-up so that learners know the challenge is to find the headings of the rows and columns, using the products given in the grid. You could then show the interactivity on the board and ask children what they notice this time. Give everyone chance to talk to a neighbour about their noticings and any questions that they might have before gathering as a whole group to share observations.įacilitate discussion so that you are confident everyone understands the construction of a table square. This problem featured in an NRICH Primary webinar in April 2021.ĭisplay the image of the completed three by three table square without saying anything by way of explanation and invite learners to consider what they see and what they notice. The task requires children to make connections, notice patterns and apply their knowledge in a way that completing a list of times tables questions does not do. Through many tables facts or many calculations, and selecting those which could be applicable. (This problem only uses the 2, 5 and 10 times tables, up to 12x.) In order to work out the row and column headings, learners will be mentally running

the fact that the answers to the multiplication calculations are given) will encourage children to be more curious about the mathematics, compared with being asked for answers to times tables questions. When you think you have cracked it, click 'Show the solution' to see if you are right. Once you know what each heading must be, drag the purple numbers to the appropriate spaces. In the interactivity below, some of the grid is filled in for you.Ĭan you work out which number goes in each row and column heading?

7 times table up to 20