The NCERT solutions for class 4 maths chapter 9 covers practice worksheets of addition and subtraction, story problems and quick methods of learning parts and wholes, where kids will understand the concept of how numbers can be split into parts. Part-whole reasoning also helps pupils to interpret, visualise and solve word problems. This solution set will improve understanding of the subject in students. Students will be able to improve their efficiency through these solutions. NCERT solutions are given systematically and sequentially, explaining all chapters in detail. Students will not find difficulty in understanding any topic of any subject.