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How does the math teacher say grams and kilograms in the second half of the second grade of primary school?
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.