Some real-life data provides the numbers for our latest sets of worksheets on using negative numbers including:• temperatures in Sapporo, Japan• temperatures in Winnipeg, Canada• temperatures in Irkutsk, Russia.Each of these cities has a climate where temperatures dip below zero in winter, often by quite a lot, and are ideal for working out the difference between positive and negative numbers. There are also opportunities to mark thermometers with the temperatures and draw line graphs of monthly figures.Go to Year 4 Number