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. kilograms |
 |
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)
|
