L5 Divide 2-Digit by 1-Digit Numbers Mentally

This Year 3 Maths resource helps children develop mental strategies for dividing 2-digit numbers by 1-digit numbers, building on prior multiplication knowledge and times-table fluency. The lesson begins with a starter that revisits multiplication calculations, encouraging discussion about mental strategies such as times-table facts, doubling, partitioning, and rounding. This sets the stage for exploring division as the inverse of multiplication. The introduction guides children through mental strategies for division, including using known facts, partitioning, and halving. The lesson emphasizes that rounding is less useful for division, as some calculations do not produce whole numbers. Concrete resources like Base 10 can support understanding, but the focus is on performing calculations mentally where possible. The main activity involves solving word problems on sticky labels, allowing children to select, solve, and explain the strategy they used to find the quotient. This encourages flexibility in mental calculations and highlights which strategies work best for different types of division problems. In the plenary, children explore a calculation (e.g., 85 ÷ 6) that cannot be solved mentally to reinforce the concept that mental strategies only work when the quotient is a whole number. Common misconceptions, such as thinking division makes numbers bigger, ignoring place value, or assuming all divisions result in whole numbers, are addressed to deepen understanding. Ideal for Year 3 teachers, this resource combines discussion, visual aids, and hands-on problem-solving to build confidence in mental division strategies and support conceptual understanding of the inverse relationship between multiplication and division.