Aitchison College, Lahore
Prep School
Department of Mathematics
Class: M2
Topic: Measurements and bounds and Standard form.
Name: ____________________________________________________________Date:_____________ Sec: _____
Q.1: Copy and complete the following table.
Measurements
a temperature in the fridge = 20c to the nearest degree
b length of the telephone cable = 64 m to the nearest m
c time taken to run 100m = 13.6s to the nearest 0.1s
Lower bound
Upper bound
Q.2: To the nearest cm, the length l of a stapler is 12 cm. As an inequality we can write
11.5 l < 12.5
In the following parts you are given measurement. Write the possible values using an
inequality as above.
a) d = 256 km
(3s.f)
b) v = 2.04 m/s
(2d.p)
c) t = 81.40C
(1d.p)
d) n = 52 000
(nearest thousand)
Q.3: If p = 7 cm and q = 5 cm, both to the nearest cm, find:
a) the largest possible value of p + q
b) the largest possible value of p – q
Q.4: Write the following in standard form.
a) 90000
b)
0.00008
Q.5: An atom is 0.000 000 000 25 cm in diameter. Write this in standard form.
Q.6: The speed of light is 300 000 km/s. Express this speed in cm/s in standard form.