You may also like

Homes

There are to be 6 homes built on a new development site. They could be semi-detached, detached or terraced houses. How many different combinations of these can you find?

Number Squares

Start with four numbers at the corners of a square and put the total of two corners in the middle of that side. Keep going... Can you estimate what the size of the last four numbers will be?

I'm Eight

Find a great variety of ways of asking questions which make 8.

Arranging Additions and Sorting Subtractions

Age 5 to 7 Challenge Level:

 

Arranging Additions and Sorting Subtractions

There are four addition calculations hidden below. 

Your challenge is to put them in order, from easiest to hardest. Try to do this without actually calculating each answer if you can.

Click on 'Show' to see them.

 

42 + 47

42 + 18

42 + 39

42 + 3

 

How did you decide the order? 

We would love to hear the reasons for your final order.

 

You might like to do exactly the same with the set of four subtraction calculations hidden below.

Click on 'Show' to see them.

 

26 - 18

26 - 7

26 - 3

26 - 10

 

Create a set of four additions or four subtractions yourself, which you think could be put in order from easiest to hardest.
Give them to someone else to order.
Do they agree with your final order? Why or why not?

You may find it useful to print off this sheet, which contains the two sets of calculations. You could cut them up into two sets of four cards.