9.1 – Units Used to Measure Mass

9.2 – The Relationship Between Kilogram and Metric Ton

9.3 – Addition of Two Masses Expressed in Metric Tons and Kilograms

9.4 – Subtraction of Masses Expressed in Kilograms and Metric Tons

9.5 – Multiplication of a Mass Expressed in Metric Tons and Kilograms by a Number

9.6 – Division of a Mass by a Whole Number