pearson malaysia sdn bhd form 4 chapter 1: standard form

Pearson Malaysia Sdn Bhd

Form 4 Chapter 1: Standard Form


All non-zero digits in a number are significant figures.

NumberNumber of

significant figures

152 3

3.7 2

42.936 5


Zeroes that lie between non-zero digits are significant figures.

NumberNumber of

significant figures

801 3

2.005 4

76.035 5


Zeroes that lie on the right of a non-zero digit in a decimal are significant figures.

NumberNumber of

significant figures

0.30 2

3.00 3

159.40 5


Zeroes that lie on the left of a non-zero digit in a decimal less than 1 are

non-significant figures.

NumberNumber of

significant figures

0.04 1

0.002 00 3

0.000 076 2


Zeroes at the end of a whole number are non-significant figures except stated otherwise.

NumberNumber of

significant figures

40 1

128 000 3

500 300 4


Correct to three significant figures

5 327 Count three significant figures starting from left.

Step 1:


2

> 5

• If it is 5 or more add 1 to the figure on the left.

Check the figure on the right of the line:

Step 2:+ 1


35 73

If it is less than 5 do not change the figure on the left.


Step 3:


735 3

Replace the figure on the right side of the line with “0”.

0


Correct to two significant figures

42.08 Count two significant figures starting from left.

Step 1:


< 5

42.08


• If it is 5 or more add 1 to the figure on the left.

Check the figures on the right of the line:

Step 2:

If it is less than 5 do not change the figure on the left.


42.08 42

Keep all the figures on the left side of the line.

Step 3:


Replace all the figures on the right side of the line with “0”.


42.08 42

We need two significant figures, thus do not put “0” after the decimal as it will be counted as extra significant figures.


pearson malaysia sdn bhd form 4 chapter 1: standard form

Documents