|
1. a
|
one dollar coin |
15 g
|
|
b
|
tree |
300 kg
|
|
c
|
grain of sand |
1 mg
|
|
d
|
tennis ball |
75 mg
|
|
e
|
pair of shoes |
100 g
|
|
f
|
small child |
45 kg
|
|
h
|
pen |
10 g
|
|
i
|
bowling ball |
3 kg
|
| 2. (i) The weight of a laptop computer − e − 3000 g |
| (ii) The weight of a tennis player − d − 74 kg |
| (iii) The weight of a litre of milk − a − 1 kg |
| (iv) The weight of an AA size battery − b − 40 g |
| (v) The weight of a small drop of liquid − f − 8 g |
| (vi) The weight of a space rocket − c − 20 tonnes |
| 3. |
mg
|
g
|
kg
|
|
340 000
|
340
|
0.340
|
|
950
|
0.950
|
0.00095
|
|
2 600 000
|
2600
|
2.6
|
4. a. 4 kg + 3 kg = 7000 g
b. 2 kg + 546 g = 2546 g
c. 8 g + 381 mg = 8.381 g
d. 6390 mg + 493 g + 1.3 kg = 1 799.39 g
e. 5 kg − 550 g = 4450 g
f. 850 mg + 0.5 g − 550 mg = 0.8 g |
| 5. a. 55 mg |
0.055 g
|
| b. 3kg |
3 000 g
|
| c. 2400 mg |
2.4 g
|
| d. 4.8 g |
4 800 mg
|
| e. 438 mg |
0.438 g
|
| f. 2.4 kg |
2400 g
|
| g. 648 g |
0.648 kg
|
| h. 320 g |
320 000 mg
|
| i. 824 mg |
0.824 g
|
| j. 5.9 kg |
5 900 000 mg
|
|
6.
|
a. 176.298 kilograms
b. 176 298 grams
c. 0.176298 tonne |
|
7.a
|
6g , 1480 mg |
7480 mg
|
|
b
|
2 kg , 950 g |
2950 g
|
|
c
|
5 t , 3650 kg |
8650 kg
|
|
d
|
9500 kg, 8.2 t |
17.7 t
|
|
e
|
0.4 kg , 5320 mg , 30 g , 0.004 t |
4435.32 g
|
|
