Lesson 2.10 ratio, rate and speed Lesson 2.9 measuring temperature Lesson 2.8 measuring time Lesson 2.7 measuring volume Lesson 2.6 measuring area Lesson 2.5 measuring perimeter and circumference Lesson 2.4 measuring mass Lesson 2.3 measuring capacity Lesson 2.2 measuring lengths Lesson 1.11 scientific notation Lesson 1.9 b multiplication and division of rational numbers Lesson 1.9 a adding and subtracting rational numbers Lesson 1.9 the set of rational numbers 
