Now that children know how to estimate answers using rounding and then check, why not extend their understanding further with this discussion problem?

This Year 5 Check Answers Discussion Problem tasks children with thinking about a real-life scenario of a famous pop singer selling tickets in 5 different European cities on her tour. How many have been approximately sold in each city? How many have approximately sold in total? Can column addition help us check the answer?

Remember that other resources (varied fluency and reasoning and problem solving) are also available to support children with their understanding of this skill.