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Young Einstein Mathematics Educational Software Contents

Activity Number 104

Heading : Addition And Subtraction Number Facts

Description : Working out simple related addition and subtraction sums

Aim/Questions : Work out the answers with your knowledge of number facts.

Educational software theory used:

Addition And Subtraction Number Facts

 

Many sums can be writing in a different ways using the same numbers but changing the operators.

 

This is because we can consider that Addition is the opposite of Subtraction, and Multiplication is the opposite of Division.

 

If we swap the number around, we can also swap the operators around.

 

For example

2 + 3 = 5

5 – 3 = 2

 

 

 

Educational software Instruction :

1.  Work out the missing part to each equation then type it into the ‘Answer Boxes’ provided.

 

2.  Press 'Enter' to move between the boxes.

 

3.  Click the 'OK' button when finished.

 

 

Module 104 These Instructions from 'Young Einstein Mathematics educational software by Maths Practice are Copyright. Copyright Maths Practice P/L 2003 ©

 


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Maths Practice, Young Einstein Mathematics & Helper Series are trademarks of Maths Practice P/L an educational software provider for years 1-6. Copyright © 2003 Maths Practice Pty. Ltd. A.B.N 67 006 774 901. All rights reserved. Affordable maths education software that produces results for schools, tutors and students.