Addition and subtraction - Add two-digit numbers - Worksheet

In this mathematics worksheet, Year 6 students are tasked with mastering the addition of two-digit numbers, with a focus on exercises that involve crossing tens. The activity aligns with the National Curriculum objective of adding numbers using concrete objects, pictorial representations, and mental calculations. Students are encouraged to use Base 10 and partitioning techniques to add together two-digit numbers, including cases where exchange is necessary, such as when the sum of ones exceeds ten. The worksheet provides a structured approach, prompting learners to add ones and tens separately before combining them to find the total sum. Key vocabulary terms such as '2-digit number', 'addition', 'total', 'partition', 'exchange', 'represent', 'value', and 'sum' are highlighted to reinforce mathematical language.

For deeper comprehension, the worksheet includes reasoning and problem-solving tasks, where students continue the process of adding ones first, then tens, using manipulatives if needed. They are encouraged to write their chosen method beside the calculation to demonstrate their understanding. The worksheet also challenges students to identify all possible pairs of numbers that complete a given addition, create calculations that result in exchanges in the ones column, and explore multiple methods for solving a problem. By engaging with these activities, students develop fluency and precision in adding two-digit numbers, while also deepening their reasoning skills and ability to articulate their mathematical thinking.