Addition and subtraction - Add two-digit numbers not crossing 10 - Worksheet

The mathematics worksheet designed for primary school children focuses on the addition of two-digit numbers without crossing the number 10. It aligns with the National Curriculum objective of adding numbers using concrete objects, pictorial representations, and mental strategies. To facilitate learning, differentiated worksheets, teaching slides, and Base 10 blocks are utilized as resources. The vocabulary for this lesson includes terms such as addition, 2-digit number, ones, tens, column method, and partition. The teaching emphasises the importance of partitioning numbers into tens and ones and starting with the ones when using the column method for addition.

Students are encouraged to solve problems and reason through a series of exercises where they add two-digit numbers, ensuring they do not cross the ten boundary. They are tasked with counting ones and tens separately and then combining them to find the total sum. For example, when adding 23 and 41, students calculate 3 ones plus 1 one and 2 tens plus 4 tens before summing these to find the final answer. The worksheet progresses to more challenging tasks where students fill in missing numbers in a sequence of addition problems, applying their understanding of the relationship between ones and tens. The aim is to build fluency and precision in addition without the need for exchanging, preparing them for more complex arithmetic operations.