Metric Mass Units (mg, g, kg, t)

Show your work for each problem.

1.
How many milligrams are in 1 gram?
1. a)100
2. b)1000
3. c)10
4. d)10000
Answer: 1000
There are milligrams in 1 gram. The prefix 'milli' means one thousandth, so 1 mg g.
2.
Which unit would you use to measure the mass of an elephant?
1. a)Milligrams (mg)
2. b)Grams (g)
3. c)Kilograms (kg)
4. d)Tonnes (t)
Answer: Tonnes (t)
An elephant typically weighs 4-6 tonnes. Using tonnes gives a manageable number instead of 4000-6000 kg.
3.
Convert 3 kg to grams.
Answer: 3000
. When converting to a smaller unit, multiply.
4.
Convert 5000 mg to grams.
Answer: 5
. When converting to a larger unit, divide.
5.
Which is heavier: 500 g or 0.4 kg?
1. a)Cannot compare
2. b)500 g
3. c)They are equal
4. d)0.4 kg
Answer: 500 g
. Since , 500 g is heavier than 0.4 kg.
6.
A recipe needs 1.5 kg of flour. You have 800 g. How many more grams do you need?
Answer: 700
1. Convert 1.5 kg to grams. What is ? 1500
2. You have 800 g. What is ? 700
7.
A truck can carry 8 tonnes. How many kilograms is this?
Answer: 8000
8.
A vitamin tablet contains 250 mg of vitamin C. If you take 2 tablets daily, how many grams of vitamin C do you take per day?
Answer: 0.5
1. How many mg total? Calculate 500
2. Convert 500 mg to grams. What is ? 0.5
9.
How many grams are in 1 tonne?
1. a)1000000
2. b)100000
3. c)1000
4. d)10000
Answer: 1000000
10.
Convert 2.75 kg to grams.
Answer: 2750
1. What is the conversion factor from kg to g? 1000
2. Calculate 2750
11.
Convert 4500 g to kilograms. Write your answer as a decimal.
Answer: 4.5
12.
A box of cereal weighs 750 g. How many boxes are needed to have at least 5 kg of cereal?
Answer: 7
1. Convert 5 kg to grams. What is ? 5000
2. Divide 5000 g by 750 g per box. What is ? 6.67
3. Since we can't buy partial boxes, round up. How many boxes? 7
13.
Convert 2,500,000 mg to kilograms.
Answer: 2.5
1. First convert mg to g. What is ? 2500
2. Now convert g to kg. What is ? 2.5
14.
A shipping container holds 15.5 tonnes of cargo. How many kilograms is this?
1. a)155000 kg
2. b)1550000 kg
3. c)1550 kg
4. d)15500 kg
Answer: 15500 kg
15.
A recipe uses 125 g of butter. If butter is sold in 250 g packs, and you need to make the recipe 6 times, how many packs do you need to buy?
Answer: 3
1. How much butter do you need in total? Calculate 750
2. How many packs? Calculate 3