001
∴ 0 00025 = (0 00025 × 10000) × 10
–4 = 2 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