Do this exercise without using a calculator 
1. Write these numbers as decimals:
| a. six tenths | b.forty two and five hundredths |
| c. five and five tenths | d. fifty six thousandths |
| e. eight thousand and eight thousandths | f. three and twenty nine hundredths |
2. Write true or false for each one:
a. 0.050 is the same as 0.05
b. 5.12 has 3 decimal places
c. 0.399 is a bigger decimal number than 0.901
d. The value of the 8 in 3.78 is eight hundredths.
e. 2.39 × 100 = 2390
3. Copy the number line below and mark the following decimals (use the letters to mark the place):
| a. 1.2 (A) | b. 0.9 (B) |
| c. 1.65 (C) | d. 0.05 (D) |
| e. 1.425 (E) | f. 0.555 (F) |
4. Calculate
|
(a) 3.5 + 4.6 |
(b) 32.1 + 7.6 |
(c) 20.6 − 10.68 |
|
(d) 0.58 + 6.2 |
(e) 7.8 − 4.1 |
(f) 243.9 − 59.362 |
|
(g) 162.78 + 6.393 |
(h) 21.79 -1 0.43 |
(i) 5.62 − 4.39 + 4.39 |
5. Calculate:
|
(a) 0.8 × 10 |
(b) 15.92 × 1000 |
(c) 59.83 ÷100 |
|
(d) 2.6 x100 |
(e) 0.16 × 100 |
(f) 51.29 ÷100 |
|
(g) 5.27 × 10 |
(h) 8.5 ÷ 100 |
(i) 19.32 ÷ 10 |
|
(j) 67.8 × 100 |
(k) 27.3 ÷10 |
(l) 0.8 ÷ 1000 |
6.
| (a) Find the sum of 9.4, 7.35 and 0.75 |  |
| (b) What is 8514.8 less 3851.6? | |
| (c) What is the product of 4.7 and 5.3? | |
| (d) How many pieces of fence post 13.2 cm long can be cut from a plank of wood 134.8 cm in length? | |
| (e) What is the perimeter of a square of side length 4.6 m? | |
| (f) Find the cost of 25 kg of bananas at $1.85 per kg. |
7. Calculate:
|
(a) 6.6 x 2.4 |
(b) 8.65 ÷ 0.5 |
(c) 0.39 x 5 |
|
(d) 2.7 x 6.4 |
(e) 8.32 ÷ 0.08 |
(f) 5.72 |
|
(g) 6 x 0.3 + 4 x 0.5 |
(h) 67.2 ÷ 0.12 |
(i) 3.12 + 3.22 |
