Max Maths, Year 4, Try it, Totals to 100 and totals to 1000 (2)

In a Year 4 mathematics exercise from Max Maths, students are encouraged to strengthen their mental arithmetic skills by finding the missing numbers that sum up to 100 or 1000. The task begins with a question that asks for the number that needs to be added to 850 to reach a total of 1000. To facilitate understanding, the problem is broken down into smaller steps: first, finding the number that needs to be added to 850 to make 900, and then determining what should be added to 900 to total 1000. The underlying goal is to enable students to see that 850 plus an additional amount equals 1000, and they are tasked with calculating this missing number.

The practice section, titled "Let's Practise," presents a series of problems where students must identify the missing addends that, when combined with given numbers, result in totals of 100. These exercises are designed to help students apply their knowledge of number pairs that sum to 10, which is a foundational skill in understanding place value and addition. Similarly, another set of problems requires students to find the numbers that, when added to various starting points, will total 1000. These activities aim to enhance students' ability to quickly and accurately perform addition, a key competency in their mathematical development. The workbook provides further exercises and resources for students to continue practicing these skills.