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枚铜板

枚铜板

枚铜板

枚铜板

1

The weight of a stack of five nickels. The weight of a hummingbird. A chocolate bar. How much did 21 grams weigh?

21 克五枚铜板的重量一只蜂鸟的重量一个巧克力棒 21 克到底有多重？

2

Is it a coin shining there ?

那儿有个闪亮的是枚铜板吗？

3

A one-cent copper coin could be exchanged for three copper coins .

当时一分铜可兑换三枚 “铜板 ”。

4

How many coins did you add? Was your guess close ? How does the surface of the water look?

结果你放进多少枚铜板？结果你猜得准吗？杯口的水面看起来如何？

5

Guess how many coins you can add before the water overflows .

猜猜看你可以投入多少枚铜板而不让水溢出来。

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