Addition and subtraction within 10 - Countback - Worksheet

The "Count Back" worksheet is an educational resource designed to help Year 6 students master addition and subtraction within 20, with a particular focus on subtracting by counting back. The National Curriculum objectives covered include adding and subtracting one-digit and two-digit numbers up to 20, using number bonds and related subtraction facts within this range, and solving one-step problems that involve these operations. The worksheet provides differentiated activities, number lines, and teaching slides to facilitate learning. Key vocabulary terms such as 'add', 'subtract', 'number bonds', 'counting on', 'missing parts', 'part-whole', 'value', and 'number sentence' are introduced to enhance the students' mathematical language.

One of the critical skills practised on the worksheet is the ability to count backwards correctly to find the answer to a subtraction problem. A common mistake to watch out for is when children include the starting number in their count, which leads to an incorrect answer. For example, when subtracting 4 from 6, they should not count the 6 and should instead start from the next number down. To help overcome this, children are encouraged to mentally note the starting number before using a number line to count back. The worksheet also includes reasoning and problem-solving tasks where students must identify errors in subtraction calculations and find multiple ways to reach a certain result by counting back, fostering a deeper understanding of the concepts.