**78000**

Number of words = 256 * 33 * 9

Estimate = 260 * 30 * 10

= 78000

**3/10; 0.305; 1/3; 35%**

- Estimate approximately to the same denominator
- So , 0.333; 0.305; 0.35; 0.3
- This makes it easier to rank the numbers

**1/20; 1/5; 1/4; 6/20; 3/2**

- Use estimation if needed. So this would involve converting all of the fractions to the highest denominator which is 20
- 6/20; 4/20; 30/20; 1/20; 5/20
- This makes it easier to rank them

**a) 24**

Half of the 48 students so 24

**b) 1/4**

**c) 4**

Pizza is about 1/3 of 1/4.

1/4 = 12 children given 1/2 = 24

So 1/3 of 12 = 4

**Approximately 40°**

An acute angle

**35**

- Use the power of estimation. This is a crucial technique in maths
- As you are doing questions, try and estimate the answer.
- When you calculate your answer, you will have an idea if you are close to the answer
- In the above, round the numbers. So it becomes 7 * 5 (Given square root of 26 is approx 5)
- Answer will be 35

**a) Approx 8cm. (Range 6 – 8cm is acceptable as it depends on the size of the online image or print out)**

**b) 35**

8s into 280 . Use bus stop

**c) £32.50**

Firstly calculate number of weeks for 2 Years. This is 52 * 2 = 104

Next , number of “8 week batches” in 104 weeks. = 13

So cost is £2.50 x 13

**d) 3,500**

4 squeaks per minute. Therefore, 240 per hour

For 14 hours, its 240 * 14 = 3,360. Nearest 500 = 3,500