: Estimation

36k 




Questions
/ instructions: Make your best guess
at the answers to the questions. As we do each question, I'll get you to write your answers on the answer sheet. 

% responses  
y4 
y8 

1. How many centimetres long do you think the rod is? within
20% of 16cm 
26 42 
45 42 

2. How many grams does the rod weigh? within
20% of 2.5g 
25 3 
27 2 

3. What do you think is the temperature of the rod?
10–24ºC 
13 50 
35 52 

4. How many millilitres of water is in the bottle? within
20% of 30ml 
6 6 
14 14 

5.
What is the temperature of the water in the bottle?
10–24ºC 
5 56 
22 63 

6. How many seconds did the swimmer take. within
20% of 16secs 
26 29 
47 32 

year
4 only within 30cm Tell me how tall I am in centimetres. I'll stand up 30–60cm out 
27
12 
. 

year
8 only within
20% of 47cm 
. 
29 44 

9. What is the weight (mass) of the wire circle? within
20% of 28g 
. 
9 6 

10. What is the area of the bottom of the water bottle? within
20% of 7cm 
. 
14 19 