Addition and subtraction within 20 - Subtraction not crossing 10 counting back - Starter

In a Year 1 maths lesson, children are introduced to the concept of subtraction within 20, focusing on the technique of counting back without crossing the number 10. The starter exercise from the 'Fluent in Four - Revision' section encourages pupils to complete number sentences by subtracting single-digit numbers from numbers up to twenty. For example, children are asked to find the result of 'Eleven minus 8', which equals 3. Another task involves understanding that subtracting half of zero from twenty still results in twenty, as half of zero is zero.

The lesson also includes a practical application of division, where the student Leanna has 12 pears and proposes to divide them into groups of 3, expecting to end up with 4 groups. This scenario is presented to the children to confirm if Leanna's statement is correct, which it is, as 12 divided by 3 indeed equals 4. Additionally, the exercise includes a comparison section where students are asked to use the greater than, less than, or equal to symbols to compare pairs of numbers, such as 'two' and 'seven' or '6' and '5'. The correct symbol in these cases would be 'greater than', as two is less than seven and six is greater than five. This activity helps children grasp basic number relationships and the concept of quantity comparison.