About this worksheet

Mental division is an essential skill for Year 4 students, helping them solve everyday problems quickly without always reaching for written methods. This worksheet focuses on the partitioning strategy, where a number is split into two friendly parts that are each easy to divide, then the results are added together.

The worksheet follows EduLift’s four-part structure, with 29 questions worth 53 marks in total. The Fluency section (16 marks) has students use partitioning to divide 2-digit numbers by single-digit divisors. The Core section (21 marks) applies this strategy to real-world problems involving charities, schools, fruit shops and bakeries, including two-part questions that build on an initial division. The Reasoning section (9 marks) asks students to explain why partitioning works, evaluate a worked example, and consider whether every 2-digit number can be split into friendly parts for a given divisor. The Challenge section (7 marks) extends students with inverse operation problems and multi-step reasoning across two divisions.

Every question and answer on this worksheet has been checked for accuracy, and the worksheet has been reviewed for clear layout and age-appropriate language before publishing.

This worksheet is aligned to the WA SCSA Mathematics curriculum for Year 4, under the Number and Algebra strand (code WA4MNADI1), and is free to download and use for classroom or home practice.

Common errors we see in tutoring

• Splitting the number into parts that don't both divide evenly
• Forgetting to add the two partitioned results back together
• Confusing which number is being divided and which is the divisor
• Rushing to a written method instead of trying mental partitioning first