Max Maths, Year 3, Practice, Converting between grams and kilograms

In the "Max Maths" Year 3 practice exercises, students are learning to convert between grams (g) and kilograms (kg). The exercises begin with a "Let's Try It" section that provides an example of how to approach the conversion problems. The first problem presents a notebook computer with a mass of 2,091 grams, and students are asked to express this mass in both kilograms and grams. They learn to divide the total grams by 1,000 to find out how many kilograms there are, and the remainder represents the grams. The formula used is "g = kg x 1,000 + g," which helps students understand that 1 kilogram equals 1,000 grams. The second example features a bicycle with a mass of 8 kilograms and 275 grams, and the task is to calculate its total mass solely in grams. Students add the mass in kilograms, converted to grams, to the mass already given in grams.

The "Let's Practise" section provides additional exercises for students to apply their conversion skills independently. They are given weights in a mix of kilograms and grams or just grams, and they must perform the appropriate conversions. For example, students will convert 5 kg 250 g to just grams by multiplying the kilograms by 1,000 and adding the extra grams. Similarly, they will convert grams to a combination of kilograms and grams, such as converting 5,307 grams into kilograms and grams by dividing by 1,000 and finding the remainder. The aim is to help students become fluent in switching between the two units of mass, which is a fundamental skill in understanding and working with metric measurements. For further practice, students are directed to workbook pages 177 to 183.