diff --git a/docs/sph3u7.md b/docs/sph3u7.md index 41a7615..1b08cc0 100644 --- a/docs/sph3u7.md +++ b/docs/sph3u7.md @@ -23,7 +23,7 @@ Every other SI unit is derived from fundamental units. Memorise these! Every SI unit can be expanded with metric prefixes. !!! example - milli + metre = millimetre ($10^{-3}) m + milli + metre = millimetre ($10^{-3}$) m | Prefix | Abbreviation | Value | Inverse ($10^{-n}$) abbreviation | Inverse prefix | | --- | --- | --- | --- | --- | @@ -55,6 +55,8 @@ Every SI unit can be expanded with metric prefixes. !!! example $$1.25 + 1.20 = 2.45$$ $$1.24 + 1.2 = 2.4$$ + $$1.2 × 2 = 2$$ + $$1.2 × 2.0 = 2.4$$ !!! warning When rounding an answer with significant figures, if the **least significant figure** is $5$, round up only if the **second-least** significant figure is odd.