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Matrices: Matrix operations — addition, subtraction and scalar multiplication
Practice Questions

20 CXC CSEC Mathematics questions on Matrices: Matrix operations — addition, subtraction and scalar multiplication, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Matrices: Matrix operations — addition, subtraction and scalar multiplication

Question 1 · 1 mark · Difficulty 1/3

Given matrices A = \(\begin{pmatrix} 3 & 5 \\ 2 & 4 \end{pmatrix}\) and B = \(\begin{pmatrix} 1 & 2 \\ 3 & 1 \end{pmatrix}\), what is A + B?

  1. \(\begin{pmatrix} 4 & 7 \\ 5 & 5 \end{pmatrix}\)
  2. \(\begin{pmatrix} 4 & 3 \\ 5 & 5 \end{pmatrix}\)
  3. \(\begin{pmatrix} 2 & 3 \\ -1 & 3 \end{pmatrix}\)
  4. \(\begin{pmatrix} 3 & 10 \\ 6 & 4 \end{pmatrix}\)
Show answer & explanation
✓ Answer: A — \(\begin{pmatrix} 4 & 7 \\ 5 & 5 \end{pmatrix}\)
Award 1 mark for correctly adding corresponding elements: (3+1, 5+2; 2+3, 4+1) = (4, 7; 5, 5). B is incorrect — the element in position (1,2) was calculated as 5+(-2) instead of 5+2. C is incorrect because it shows A − B instead of A + B. D is incorrect because it multiplies elements instead of adding them.
Question 2 · 1 mark · Difficulty 1/3

Which of the following conditions must be satisfied for two matrices to be added together?

  1. Both matrices must be square matrices
  2. Both matrices must have the same order (same number of rows and columns)
  3. The number of columns in the first matrix must equal the number of rows in the second
  4. Both matrices must contain only positive elements
Show answer & explanation
✓ Answer: B — Both matrices must have the same order (same number of rows and columns)
Award 1 mark for stating that matrices must have the same order (dimensions). A is incorrect — matrices do not need to be square, only of equal dimensions. C is incorrect — this is the condition for matrix multiplication, not addition. D is incorrect — the sign of elements does not affect whether addition is possible.
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CXC CSEC Mathematics: Matrices: Matrix operations — addition, subtraction and scalar multiplication FAQ

How many CXC CSEC Mathematics questions on Matrices: Matrix operations — addition, subtraction and scalar multiplication are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Matrices: Matrix operations — addition, subtraction and scalar multiplication for CXC CSEC Mathematics, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CXC paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CXC CSEC students preparing for Mathematics?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Matrices: Matrix operations — addition, subtraction and scalar multiplication practice with other Mathematics topics or even switch to a totally different CXC subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Matrices: Matrix operations — addition, subtraction and scalar multiplication questions aligned to the official CXC CSEC Mathematics syllabus?
Every question is written against the published CXC CSEC Mathematics specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CXC paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CXC.
How is Matrices: Matrix operations — addition, subtraction and scalar multiplication typically tested on CXC CSEC Mathematics papers?
Matrices: Matrix operations — addition, subtraction and scalar multiplication appears across multiple question types on real CXC CSEC Mathematics papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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