Verify that 0.0065=6.5×10−30.0065 = 6.5 \times 10^{-3}0.0065=6.5×10−3.
Verify that 3×104=30 0003 \times 10^4 = 30\,0003×104=30000.
261 exam-style questions on Eduqas GCSE Maths Standard Form. Each one has a worked solution and a mark scheme showing where the marks go.