5 × 10
–4
Rationalised 2023-24
147
Appendix
In each case, we divide or multiply the decimal by a power of 10, to bring one non-zero digit to the left
of the decimal point, and do the reverse operation by the same power of 10, indicated separately Thus, any positive decimal can be written in the form
n = m × 10
p
where p is an integer (positive, zero or negative) and 1< m < 10 This is called the “standard form of n ”
Working Rule
1