Measuring mass in g and kg | Year 3 Mathematics PDF Download

Why Do We Measure Mass?

• Measuring mass is essential in everyday tasks like baking or cooking, where precision with ingredients is crucial for the taste of the final product.
• Grams (g) and kilograms (kg) are the units commonly used for measuring mass.
• Remember, 1000 grams equals 1 kilogram (1 kg).
• When reading scales, it's important to pay close attention to the intervals (divisions) between the numbers. These intervals indicate the measurements precisely.
• Scales clearly indicate whether you are measuring in grams or kilograms, helping you accurately weigh ingredients.

Solved Examples

Example 1: How would you draw an arrow to represent the mass of 7 kg and 800 g?
Sol: First, determine what each smaller division represents between the whole kilograms.
The kilograms on the scale are divided into 10 parts, so each division represents 100 grams.
Next, locate the 8th division beyond 7 kilograms and mark it to indicate 7 kilograms and 800 grams.
Illustrate it as follows:

Example 2: Take a look at the scales below.
When reading scales, the first thing you have to do is look at the intervals. What are the divisions going up in?
Sol: The larger intervals increase by hundreds. Additionally, there are smaller intervals between each hundred, which are each worth 50 grams since they represent the halfway point between hundreds.
The arrow on the scale is positioned at the smaller division between 700 grams and 800 grams, indicating that the mass of the fruit is 750 grams.