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Shang Qi Mathematics Lele
Smile: 10*3=3.3 (Dao) (rounded)

Lele: 15*4=3.75 (road)

Lele does it quickly.

3/2 ton =3/2* 1000 kg = 666.666 kg ...

Because 666666...kg < 670 kg.

Therefore, it is wrong that 670 kilograms of goods are lighter than 2/3 tons of goods.

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