Master Addition Calculations | BrainBuzz
Left Overs Challenge

Master Addition Calculations

Build confidence in your written addition methods

Master Addition Calculations

What is Left Overs?

A unique puzzle game that combines problem-solving with pattern recognition

Left Overs is an engaging mathematical puzzle game where you answer questions to eliminate answers from a grid. Here's the twist: not all the values in the grid are answers to questions! Some are "left overs" - extra values placed as distractors. Your challenge is to answer all the questions correctly, identify which values remain, and calculate their total.

The Core Concept

  • A chosen selection of random questions from our question bank will be presented on screen
  • A bank of answers will be shown including all the correct answers, plus additional answers which will be left over
  • Click questions to answer them and cross off the corresponding value
  • Find the pattern - which values are left over?
  • Calculate the total of those remaining values

How This Version Works

Specific to: Master Addition Calculations

Skills You'll Practice

Vertical or column addition of 2 or more digit values.

Game-Specific Instructions

Click on a question from the question bank and calculate the answer. Use a whiteboard or paper to support your working as this isn't a mental mathematics task. If you are correct, the answer will be crossed off the answer grid. When all questions have been completed you will have some answers left. Add those into the given boxes, then add them together to find the final target number.

Example Question

247 + 865 =
1112

How to Play

Follow these simple steps to master the game

1

Choose Game Size

Select small (9 questions), medium (16 questions), or large (20 questions)

2

Answer Questions

Click on any question box to open the answer prompt

3

Watch Grid Update

Correct answers automatically cross off from the answer grid

4

Identify Remainders

Find the values that weren't crossed off - these are your "left overs"

5

Calculate Total

Enter the remaining values and their total to complete the puzzle

Why Play Left Overs?

Multiple skills in one engaging game

🎯

Multi-Skill Practice

Combines answering questions, pattern recognition, and mental arithmetic in one game

Self-Checking

The final total acts as a built-in verification - you'll know if you got everything right!

🧠

Critical Thinking

Requires careful tracking of which values have been eliminated and which remain

📊

Adaptive Challenge

Choose your difficulty by selecting game size - start small and work your way up!

Available Levels

  • More than 4 Digit Addition
    Calculations involving + calculations involving more than 4 digit numbers.
    Completed:
    Warning: Undefined array key "plays_completed" in /home/storage/060/4775060/user/htdocs/maths/leftovers.php on line 496
    times
  • 2 Digit + 3 Digit Addition
    Addition calculations involving 2 and 3 digit numbers.
    Completed:
    Warning: Undefined array key "plays_completed" in /home/storage/060/4775060/user/htdocs/maths/leftovers.php on line 496
    times
  • 3 Digit + 4 Digit Calculations
    Tackle a mixture of 3 and 4 digit addition calculations.
    Completed:
    Warning: Undefined array key "plays_completed" in /home/storage/060/4775060/user/htdocs/maths/leftovers.php on line 496
    times

More Maths Activities

Explore other engaging Maths games to enhance your learning

Ready to Find the Left Overs?

Start the challenge and test your skills

Start Playing Now

Free to use • Self-checking puzzles • Works on all devices