To order from least to greatest, convert all measurements to grams: 7,800 mg becomes 7.8 g, and 0.5 kg becomes 500 g. The order is 7.8 g, 500 g, and 891 g.
To order the weights 891 g, 7,800 mg, and 0.5 kg from least to greatest, we first convert them all to the same unit. Given that there are 1,000 mg in a gram (g) and 1,000 g in a kilogram (kg), we can convert as follows:
- 7,800 mg is converted to grams by dividing by 1,000, which gives us 7.8 g.
- 0.5 kg is converted to grams by multiplying by 1,000, which gives us 500 g.
Now that we have all the weights in grams, we can easily compare them:
Ordering these from least to greatest, we get: 7.8 g < 500 g < 891 g.