In “Why Do We Learn Average?”, we learn 1 kg = 1000 g. As adults, we understand the concept of 1 kg = 1000 g, which means if I carry 1000 bags weighting 1 g each, it means I carry a total weight of 1 kg. But children are confused when they see “g” and “kg”.

Below are the pictures showing equivalence of the weight by using weighting scale, to help children to understand better:

(a) 10 g = 10 x 1 g

(a) The weighting scale is balance. Thus, we know the weight on the right is equal to the weight on the left. That means if I have 10 bags weighting 1 g each, I have a total weight of 10 g.

(b) 100 g = 10 x 10 g

(b) The weighting scale is balance. With the 10 g each bag from example (a), I fill 10 bags. So, I have 10 bags with 10 g each.

10 x 10 = 100

Thus, I have a total weight of 100 g.

(c) 1000 g = 10 x 100 g

1000 g = 1 kg

(c) The weighting scale is balance.

With the 100 g each bag from example (b), I fill another 10 bags. So, I have 10 bags with 100 g each.

10 x 100 = 1000

Thus, I have a total weight of 1000 g, which is also equivalent to 1 kg.

On the other hand, if I just have many bags of 1 g, for 1 kg, I will have 1000 bags of 1 g each.

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~ Wendy ~