Max Maths, Year 5, Work Book, Deriving pairs of decimals with a total of 10

In the Max Maths Year 5 Workbook, students are given the task of deriving pairs of decimals that together total 10. The exercise is split into two main sections. In the first section, Practice 2, students are asked to add pairs of decimal numbers, focusing on adding the ones and tenths separately to reinforce their understanding of place value. For example, they would calculate 3.4 + 6.6 by adding the ones (3 + 6) and the tenths (0.4 + 0.6) to confirm that the sum equals 10. This method is applied to a series of decimal pairs, such as 5.8 + 7.2, 9.1 + 0.9, and several others, each time ensuring that the sum of the ones and the sum of the tenths are correct and that the overall total is 10.

The second section of the exercise involves observation and matching activities. Students are prompted to notice patterns, such as the ones always adding up to a certain number, and the tenths always summing to another specific number. This leads to a matching activity where students must pair numbers that together make a total of 10, such as matching 1.4 with 8.6 or 5.5 with 4.5. Finally, they are challenged to write the complementary number to make a total of 10 when given one number in the pair, for instance, finding the number that pairs with 3.6 or 2.7 to make the sum of 10. These exercises are designed to enhance the students' understanding of decimal place value and addition.