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TN-MATH-GR3-11640 · v3.-7

Probability Basics

Grade 3 · Math · Statistics · Cambridge (CAIE)

Grade

Grade 3

Subject

Math

Topic

Statistics

Subtopic

Probability Basics

Curriculum

Cambridge (CAIE)

Difficulty

Core

Time

30 minutes

Total marks

46

Student name

Teacher name

Date

Learning objectives

  • Recognise probability basics accurately in math contexts.
  • Explain the underlying rule of probability basics in the student's own words.
  • Apply probability basics to multi-step and unfamiliar problems.
  • Justify a chosen method and identify errors in another student's work.

Skills assessed

  • Fluency and recall
  • Method and setting out
  • Reasoning and justification
  • Problem solving in context
  • Self-assessment

Instructions

  1. Write your name, your teacher's name and the date in the header.
  2. Answer every question in the space provided. Continue on the back if needed.
  3. Show all working — method marks are awarded even when the final answer is wrong.
  4. Aim to finish in about 30 minutes.
  5. Complete the reflection box at the end before you hand the sheet in.

Warm-up

Bloom: Remember · 4 marks

Answer quickly. These check you are ready for the topic.

  1. 1.Write down one fact you already know about probability basics.

    [1]
  2. 2.Write down one fact you already know about probability basics.

    [1]
  3. 3.Circle one fact you already know about probability basics.

    [1]
  4. 4.Write down one fact you already know about probability basics.

    [1]

Recall

Bloom: Remember · 4 marks

Complete from memory. No calculator, no notes.

  1. 1.Define the key term used in probability basics described here: item 1.

    [1]
  2. 2.Complete the key term used in probability basics described here: item 2.

    [1]
  3. 3.Label the key term used in probability basics described here: item 3.

    [1]
  4. 4.Label the key term used in probability basics described here: item 4.

    [1]

FreeMathWorksheet · TN-MATH-GR3-11640 · v3.-7

© 2026 FreeMathWorksheet. Licensed for classroom and home use. Redistribution or resale is not permitted.

Page 1 of 4

FreeMathWorksheet · Grade 3 Math

Probability Basics

Basic Practice

Bloom: Understand · 5 marks

Work through each item. Show the step you used.

  1. 1.Identify part 1 using the rule for probability basics.

    [1]
  2. 2.Match part 2 using the rule for probability basics.

    [1]
  3. 3.Work out part 3 using the rule for probability basics.

    [1]
  4. 4.Match part 4 using the rule for probability basics.

    [1]
  5. 5.Match part 5 using the rule for probability basics.

    [1]

Guided Practice

Bloom: Understand · 8 marks

The first step is given. Finish the reasoning.

  1. 1.Complete the method for part 1. Step 1 has been started for you.

    [2]
  2. 2.Continue the working for part 2. Step 1 has been started for you.

    [2]
  3. 3.Continue the working for part 3. Step 1 has been started for you.

    [2]
  4. 4.Complete the method for part 4. Step 1 has been started for you.

    [2]

FreeMathWorksheet · TN-MATH-GR3-11640 · v3.-7

© 2026 FreeMathWorksheet. Licensed for classroom and home use. Redistribution or resale is not permitted.

Page 2 of 4

FreeMathWorksheet · Grade 3 Math

Probability Basics

Independent Practice

Bloom: Apply · 10 marks

No scaffolding. Set out your full method.

  1. 1.Determine part 1 on probability basics without help.

    [2]
  2. 2.Calculate part 2 on probability basics without help.

    [2]
  3. 3.Calculate part 3 on probability basics without help.

    [2]
  4. 4.Work out fully part 4 on probability basics without help.

    [2]
  5. 5.Calculate part 5 on probability basics without help.

    [2]

Challenge Questions

Bloom: Analyse · 9 marks

Harder items. Attempt every one, even partially.

  1. 1.Show that the statement in part 1 about probability basics.

    [3]
  2. 2.Find and justify the statement in part 2 about probability basics.

    [3]
  3. 3.Prove the statement in part 3 about probability basics.

    [3]

FreeMathWorksheet · TN-MATH-GR3-11640 · v3.-7

© 2026 FreeMathWorksheet. Licensed for classroom and home use. Redistribution or resale is not permitted.

Page 3 of 4

FreeMathWorksheet · Grade 3 Math

Probability Basics

Real-life Application

Bloom: Apply · 6 marks

Use the skill in context. State units in your answer.

  1. 1.Use the information to decide a real math situation that depends on probability basics.

    [3]
  2. 2.In context, work out a real math situation that depends on probability basics.

    [3]

Reflection

Bloom: Create · 0 marks

Not marked. Answer honestly — this guides your next worksheet.

  1. 1.Record how confident you feel with probability basics and what you will practise next.

    [—]
  2. 2.Reflect on how confident you feel with probability basics and what you will practise next.

    [—]

FreeMathWorksheet · TN-MATH-GR3-11640 · v3.-7

© 2026 FreeMathWorksheet. Licensed for classroom and home use. Redistribution or resale is not permitted.

Page 4 of 4