JSS 1 · Build strong foundations
JSS 1 Mathematics made simple
JSS 1 is where secondary-school Maths begins. You meet whole numbers in the millions and billions, fractions and decimals, directed (negative) numbers, your first algebraic expressions and simple equations, and the basic shapes of geometry.
MathPlug explains each idea in plain English with pictures you can play with — fraction circles, a number line and an algebra balance — then lets you practise with instant feedback that shows exactly where a mistake happened.
- ✓ Fractions you can see and touch
- ✓ Negative numbers on a number line
- ✓ Solving your first equations
- ✓ Perimeter, area and angles
What you'll learn in JSS 1
10 topics across three terms, following the Nigerian (NERDC) Mathematics curriculum. 24 interactive lessons are ready now, with more being added.
First Term
Whole Numbers
Factors, Multiples & Primes
Fractions
Decimals & Percentages
Second Term
Third Term
▶ Green lessons are ready to play now.
Try some JSS 1 practice questions
Every answer below was worked out and checked by the MathPlug maths engine. Tap to see the steps.
Question 1
A shop gives a discount of 12% on a bag of rice that costs ₦1,500. How much is the discount?
- A₦180
- B₦1,680
- C₦1,320
- D₦1,800
Show answer and working
Step 1: Write the percentage as a fraction
12% of ₦1,500 = 12100 × 1,500
Step 2: Work it out
= ₦180
Final answer: ₦180
Question 2
Convert 100102 to a number in base ten.
- A10,010
- B9
- C2
- D18
Show answer and working
Step 1: Write each place as a power of 2
100102 = 1 × 24 + 0 × 23 + 0 × 22 + 1 × 21 + 0 × 20
Step 2: Work out each part
= 16 + 0 + 0 + 2 + 0
Step 3: Add
= 18
Final answer: 18
Question 3
In an isosceles triangle, the angle between the two equal sides is 80°. Find one of the base angles.
- A80°
- B50°
- C140°
- D100°
Show answer and working
Step 1: What is left for the base angles
180° − 80° = 100°
Step 2: Share equally
100° ÷ 2 = 50°
Final answer: 50°