## Weight Exercise

1. Choose the best measurements for the following items:

 a two dollar coin 15 g 1.5 kg b tree 3000 g 300 kg c grain of sand 1 mg 1 kg d tennis ball 75 mg 0.75 kg e pair of shoes 1 kg 100 g f small child 45 g 45 kg h pen 10 mg 10 g i small bowling ball 3000 mg 3 kg

2. Match up the following objects with the list of likely weights:

 (i) The weight of a laptop computer a.1 kg (ii) The weight of a tennis player b. 40 g (iii) The weight of a litre of milk c. 20 tonnes (iv) The weight of an AA size battery d. 74 kg (v) The weight of a small drop of liquid e. 3000 g (vi) The weight of a space rocket f. 8 g

3. Complete this table:

 mg g kg 340 950 2.6

4. Calculate the following and leave the answers in grams:

a. 4 kg + 3 kg
b. 2 kg + 546 g
c. 8 g + 381 mg
d. 6390 mg + 493 g + 1.3 kg
e. 5 kg − 550 g
f. 850 mg + 0.5 g − 95 mg

5. Convert each of the following measurements to the units given in brackets

 a. 55 mg (g) b. 3kg (g) c. 2400 mg (g) d. 4.8 g (mg) e. 438 mg (g) f. 2.4 kg (g) g. 648 g (kg) h. 320 g (mg) i. 824 mg (g) j. 5.9 kg (mg)

 6. The weights of two people are 84.459 kg and 91.839 kg. Express the total weight of the two people in: a. kilogramsb. gramsc. tonnes

7. Add together the following weights and give the answer in the units given in brackets.

 a 6g , 1480 mg (mg) b 2 kg , 950 g (g) c 5 t , 3650 kg (kg) d 9500 kg, 8.2 t (t) e 0.4 kg , 5320 mg , 30 g , 0.004 t (g)