BitWithBite
Mathematics Worksheet
🔲 Matrices
SCORE___ / 20
NameClassDate
After this worksheet you can
Add and subtract matrices.Multiply a matrix by a scalar.Understand matrix dimensions.Recognise when operations are allowed.📚 Quick Recap
A matrix is a rectangular grid of numbers — a compact way to organize and manipulate large sets of data, and the backbone of computer graphics, data science, and systems of equations.
🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4
1[[2,1],[3,4]] + [[1,2],[0,5]] = ?
2[[9,8],[7,6]] − [[4,3],[2,1]] = ?
35 · [[1,2],[3,4]] = ?
4To add two matrices they must have the same:
🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11
5To add matrices, add the entries.
6Matrices need the same to be added.
7Add [[2,1],[3,4]] and [[1,2],[0,5]].
8Subtract [[9,8],[7,6]] − [[4,3],[2,1]].
9Multiply [[1,2],[3,4]] by scalar 5.
🚀 Section C · Challenge ● CHALLENGE 5
10Multiply [[0,1],[2,3]] by scalar −1.
💭 Reflection — the most useful thing I learned:
A ___/4 B ___/11 C ___/5 Total ___/20
Teacher's Signature
Parent's Signature
✂ answer key — fold or cut before handing out
1-A 2-A 3-A 4-B | 5 corresponding 6 dimensions 7 = [[3,3],[3,9]] 8 = [[5,5],[5,5]] 9 = [[5,10],[15,20]] | 10 = [[0,−1],[−2,−3]]