Max Maths, Year 4, Practice, Totals to 100 and totals to 1000

In a Year 4 mathematics practice session, students are tasked with finding pairs of numbers that total 100 and 1000. For example, they are asked to determine what number needs to be added to 850 to make a total of 1000. To solve this, they must first find the number that, when added to 850, equals 900. Following this step, they identify the number that must be added to 900 to reach 1000. The aim is to understand that adding a certain number to 850 will give a total of 1000. This exercise helps students to grasp the concept of complements in relation to base numbers like 100 and 1000.

The practice continues with exercises that encourage mental arithmetic, using their knowledge of pairs to 10 as a helpful tool. Students are presented with a series of equations with missing numbers that they must fill in to reach totals of 100, such as 21 + ? = 100 or 43 + ? = 100. They are also provided with similar problems to find the missing number that, when added to various amounts, will total 1000, for instance, 350 + ? = 1000 or 750 + ? = 1000. These exercises are designed to strengthen their understanding of number relationships and arithmetic reasoning. The workbook provides further opportunities for practice and consolidation of these skills.