Answer:
Q1 - 60 Q3 - 9
Step-by-step explanation:
Q1
Firstly you must establish what the question is asking you to do
which is 1 s.f
The question is as follows 3.1 x 9.87 / 0.509
We are told to work out an estimate using only 1 s.f
Now we must round the numbers to 1 s.f
3.1 - 3
9.87 - 10
0.509 - 0.5
So the equation is as follows 3 x 10 / 0.5
30 / 0.5
To do this you can note it down as 300 / 5
= 60
Q3
First we must round the values to 1 s.f
This changes it from
89.3 x 0.51 /4.8 to 90 x 0.5 / 5
90 x 0.5 = 45
45 / 5 = 9
Therefore an estimation for Q3 is 9
