Order of operations, working with fractions and decimals, converting among fractions, decimals and percentages, finding percentages of quantities, and powers and roots.
5 narrated scenes. Press play, listen and read along — the points appear as they are explained. Use ‹ Prev / Next › or the scene bar to jump to any scene.
Marks in Paper 02 are won or lost in the first question — and it is nearly always computation. Master these skills and you bank points before the hard questions start.
Narration uses your device’s built-in voice. No sound? Switch to “Captions only” — the captions advance on their own.
Copy these into your notebook in your own words — that is how they stick.
Brackets, Orders, Division/Multiplication, Addition/Subtraction. Work left to right at the same level.
Add/subtract with a common denominator; multiply across; divide by flipping the second fraction. Simplify answers; mixed numbers → improper first.
Fraction → decimal: divide. Decimal → %: ×100. % → fraction: ÷100 and simplify.
Convert to a decimal and multiply: 15% of 240 = 0.15 × 240.
part ÷ whole × 100.
Increase: × (1 + r/100). Decrease: × (1 − r/100). % change = change ÷ original × 100.
x^(m/n) = (ⁿ√x)^m. x⁻ⁿ = 1/xⁿ. x⁰ = 1.
Use brackets and the fraction key; check the answer is sensible before moving on.
3 quick games on this lesson. Earn XP and badges as you play — your best score for each game is saved. Games are for practice and do not change your exam readiness. More games in the Mathematics Arcade.
8 items modelled on real CSEC Paper 1 questions. Choose one answer for each, then check. Aim for 80% or better. Work each item on paper first.
Write full answers, then reveal the mark scheme and tick the points you earned (17 marks in total). Show all your working — method marks count. Your answers are saved on this device.
Question 1 [9 marks]
A calculator may be used.
(a) Evaluate, giving the answer as a mixed number in its simplest form: 2 1/3 + 1 3/4. [3]
(b) Write 0.45 as a fraction in its simplest form and as a percentage. [2]
(c) In a school of 1 250 students, 36% are in Forms 1–3. (i) How many students are in Forms 1–3? (ii) The number in Forms 4 and 5 is 20% of the number in Forms 1–3. How many are in Forms 4 and 5? [4]
Question 2 [8 marks]
Use these to answer the parts below.
(a) The price of a phone increases from $1 200 to $1 380. Calculate the percentage increase. [3]
(b) Evaluate, showing working: (i) 16^(1/2) × 27^(1/3) (ii) 2⁻³ [3]
(c) Evaluate 5 + 18 ÷ 3² − (−4)(2). [2]
Find these in your own past-paper booklets for extra timed practice. Items above are written in the style of these papers; any adapted from a specific question say so.