## Year 2 Addition and subtraction Return to Primary Maths Resources

### Student resources.

The Add and Take-away Path: http://nrich.maths.org/7281

Secret Number: http://nrich.maths.org/5651

How Many?: http://nrich.maths.org/6927

What Was in the Box?: http://nrich.maths.org/7819

Doing and Undoing: http://nrich.maths.org/8292

Thinking of a number

Give students the following instructions.

- I’m thinking of a number. I multiply it by 5 and then subtract 7. The answer is 58. What number was I thinking of?
- I’m thinking of a number I multiply it by 3.I then subtract 6.I then divide by 2 and then add 5. The answer is 23. What was my number?