1. Write these numbers as decimals:
| a. 0.6 | b. 42.05 |
| c. 5.5 | d. 0.056 |
| e. 8000.008 | f. 3.29 |
2. Write true or false for each one:
a. 0.050 is the same as 0.05. TRUE
b. 5.12 has 3 decimal places. FALSE
c. 0.399 is a bigger decimal number than 0.901. FALSE
d. The value of the 8 in 3.78 is eight hundredths. TRUE
e. 2.39 × 100 = 2390. FALSE
3. 
4. Calculate
|
(a) 3.5 + 4.6 = 8.1 |
(b) 32.1 + 7.6 = 39.7 |
(c) 20.6 − 10.68 = 9.92 |
|
(d) 0.58 + 6.2 = 6.78 |
(e) 7.8 − 4.1 = 3.7 |
(f) 243.9 − 59.36 = 184.54 |
|
(g) 162.78 + 6.393 = 169.173 |
(h) 21.79 -1 0.43 = 11.36 |
(i) 5.62 − 4.39 + 4.39 = 5.62 |
5. Calculate:
|
(a) 0.8 × 10 = 8 |
(b) 15.92 × 1000 = 15920 |
(c) 59.83 ÷100 = 0.5983 |
|
(d) 2.6 x100 = 260 |
(e) 0.16 × 100 = 16 |
(f) 51.29 ÷100 = 0.5129 |
|
(g) 5.27 × 10 = 52.7 |
(h) 8.5 ÷ 100 = 0.085 |
(i) 19.32 ÷ 10 = 1.932 |
|
(j) 67.8 × 100 = 6780 |
(k) 27.3 ÷10 = 2.73 |
(l) 0.8 ÷ 1000 = 0.0008 |
6.
| (a) Find the sum of 9.4, 7.35 and 0.75. The sum is 17.5 |  |
| (b) What is 8514.8 less 3851.6? The answer is 4663.2 | |
| (c) What is the product of 4.7 and 5.3? The product is 24.91 | |
| (d) How many pieces of fence post 13.2 cm long can be cut from a plank of wood 150 cm in length? 11 fence posts could be cut. | |
| (e) What is the perimeter of a square of side length 4.6 m? The perimeter is 18.4 metres | |
| (f) Find the cost of 25 kg of bananas at $1.85 per kg. The bananas cost $46.25 |
7. Calculate:
|
(a) 6.6 x 2.4 = 15.84 |
(b) 8.65 ÷ 0.5 = 17.3 |
(c) 0.39 x 5 = 1.95 |
|
(d) 2.7 x 6.4 = 17.28 |
(e) 8.32 ÷ 0.08 = 104 |
(f) 5.72 = 32.49 |
|
(g) 6 x 0.3 + 4 x 0.5 = 3.8 |
(h) 67.2 ÷ 0.12 = 560 |
(i) 3.12 + 3.22 = 19.85 |
