Solve problems involving scientific notation

1. It's Astronomical! 1 - kiloyears and galactic years, scientific notation
2. The Featherweight Division - mass in kg, multiples, scientific notation
3. The Featherweight Division - adding and subtracting mass in g, express answer in kg using scientific notation
4. The Featherweight Division - mass in kg, multiples, scientific notation
5. The Featherweight Division - mass in kg, multiples, scientific notation
6. Moon-Light? - mass in kg, multiples, scientific notation
7. Heavy Maths - mass in kg, multiples, scientific notation
8. Moon-Light? - combined mass, kg, scientific notation
9. Moon-Light? - combined mass, kg, scientific notation