Mochi does Maths!

Ms Carolina's Math class

Presumed knowledge

When you join the course for the first year, there is a set of knowledge you are expected to have. Before you join the program, you might want to make sure you have covered these topics before, if you haven't, please revise them, and find support to learn those you have not encountered before. Please find the list of topics below.


  • Number systems: natural numbers ℕ; integers, ℤ; rationals, ℚ, and irrationals; real numbers, ℝ
  • SI (Système International) units for mass, time, length, area and volume and their derived units, eg. speed
  • Rounding, decimal approximations and significant figures, including appreciation of errors
  • Definition and elementary treatment of absolute value (modulus), a
  • Use of addition, subtraction, multiplication and division using integers, decimals and fractions, including order of operations
  • Prime numbers, factors (divisors) and multiples
  • Greatest common factor (divisor) and least common multiples (HL only)
  • Simple applications of ratio, percentage and proportion
  • Manipulation of algebraic expressions, including factorization and expansion
  • Rearranging formulae
  • Calculating the numerical value of expressions by substitution
  • Evaluating exponential expressions with simple positive exponents
  • Evaluating exponential expressions with rational exponents
  • Use of inequalities, <,≤,>,≥, intervals on the real number line
  • Simplification of simple expressions involving roots (surds or radicals)
  • Rationalising the denominator
  • Expression of numbers in the form a×10k, 1≤a<10, k∈ℤ
  • Familiarity with commonly accepted world currencies
  • Solution of linear equations and inequalities
  • Solution of quadratic equations and inequalities with rational coefficients 
  • Solving systems of linear equations in two variables
  • Concept and basic notation of sets. Operations on sets: union and intersection
  • Addition and subtraction of algebraic fractions.

  • Graphing linear and quadratic functions using technology
  • Mappings of the elements of one set to another. Illustration by means of sets of ordered pairs, tables, diagrams and graphs.


  • Pythagoras’ theorem and its converse
  • Mid-point of a line segment and the distance between two points in the Cartesian plane
  • Geometric concepts: point, line, plane, angle
  • Angle measurement in degrees, compass directions
  • The triangle sum theorem
  • Right-angle trigonometry, including simple applications for solving triangles
  • Three-figure bearings
  • Simple geometric transformations: translation, reflection, rotation, enlargement
  • The circle, its centre and radius, area and circumference. The terms diameter, arc, sector, chord, tangent and segment
  • Perimeter and area of plane figures. Properties of triangles and quadrilaterals, including parallelograms, rhombuses, rectangles, squares, kites and trapezoids; compound shapes
  • Familiarity with three-dimensional shapes (prisms, pyramids, spheres, cylinders and cones)
  • Volumes and surface areas of cuboids, prisms, cylinders, and compound three-dimensional shapes


  • The collection of data and its representation in bar charts, pie charts, pictograms, and line graphs
  • Obtaining simple statistics from discrete data, including mean, median, mode, range
  • Calculating probabilities of simple events
  • Venn diagrams for sorting data
  • Tree diagrams

  • Speed = distance/time


To refresh some of your presumed knowledge:

Math textbook - Pre IB course

To get some extra math support:

Khan Academy

To get ahead of the game:

Mathematics Analysis and approaches


IB Academy

Cambridge review worksheets