Grams are units of weight. Maybe you have all heard of 1 kg, 2 kg, and this kg is the unit of weight. So what does this catty have to do with grams?

1 kg = 500g

Now the electronic scales in the supermarket and outside are all kilogram scales.

2kg = 1 kg = 1 000g =1kg

Give some common examples, such as an apple, a bag of milk and a piece of bread. Many labels will write the weight, so that students can have a specific understanding of these weights.