Answer the questions on the pages arithmetic with decimals, part 2: multiplying decimal numbers, part 3: dividing decimal numbers.

Part 2 here as attached

Is there any opitions? if you have the periodic table, the noble gases are 8a family, the halogen are the 7a family, and the nonmetal are  carbon, nitrogen, phosphorus, oxygen, sulfur, selenium, fluorine, chlorine, bromine, iodine and astatine.