Approximation - Test Bite

1. Bert, Alice and Sally enter a 'guess the weight of the cake' competition. The actual weight of the cake is 800g. Who is closest to the correct answer?

Bert guesses 755g
Alice guesses 824g
Sally guesses 770g

2. Round 47.53m to the nearest ten metres

45
40
50

3. Round 5734.7 to the nearest whole number

5700
5735
5740

4. Anne buys a book for £3.99 and a folder for £1.99. Estimate how much she pays in total.

£5
£6
£7

5. Anita is painting her bedroom. The area of the wall is 29m squared, and each can of paint will cover an area of about 11m squared. Estimate how many cans of paint Anita will need to buy.

3 cans
1 can
5 cans

6. Gary wants to estimate the answer for 689 x 69. He uses the approximation 700 x70. Will his approximation be higher or lower than the actual answer?

Higher
Lower
The same

7. Round 3.643 to 2 decimal places (d.p.)

3.6
3.64
3.7

8. Which number has 4 significant figures?

2.007
0.003
0.20

9. Round 2.99 to 2 s.f.

2.9
3.0
3.1

10. Round 7.00521 to 3 s.f.

7.02
7.01
7.06