
4th Grade · Logic & Problem Solving
Shape Algebra: Three Mystery Shapes
Free printable 4th Grade logic & problem solving worksheet: Shape Algebra: Three Mystery Shapes. It practices unknown numbers (Common Core 4.OA.A.3). For ages 9-10. Download the PDF, print it, or fill it in online.
Fill in or color online- Grade
- 4th Grade
- Subject
- Logic & Problem Solving
- Skill
- Unknown numbers
- Ages
- 9–10
- Standard
- 4.OA.A.3
- Format
- A4 PDF · print or fill in online
About this worksheet
“Shape Algebra: Three Mystery Shapes” is sheet 10 of 25 in our free 4th Grade Logic & Problem Solving Worksheets collection, written for children aged 9–10. It focuses on unknown numbers.
In the set it comes after “Coding with Loops and Conditions” and before “Magic Squares Challenge”. Working through them in that order, one sheet a day, builds the skill a step at a time.
What this worksheet practices
4.OA.A.3 · Common Core Math · Grade 4
Operations & Algebraic Thinking
Children work on understanding multiplication and division alongside addition and subtraction, solving word problems with all four, and spotting patterns in numbers.
How to use this worksheet
- 1
Encourage your child to talk through each logic grid clue out loud.
- 2
On the sudoku, pencil small candidate numbers in the corners before committing.
- 3
For the coding sheet, act out the program by walking the steps on a floor grid.







