# KS2, Calculation

**Here's a fun reverse bingo game... **I call it '**reverse**' because the Bingo Boards the children use all feature written subtraction problems, such as ‘50 – 32’ or ‘50 – 19’. **Read more »**

**This is a straightforward number game for 2-4 players.** You need 4 sets of **0-9 digit cards**, a sand timer (or stopwatch) and individual whiteboards (or notepaper). **Read more »**

**There are hundreds of versions of "Think of a Number..." tricks.** This one is perfect for **Friday 13th**. When I used it some years ago, the children wanted to know how it was done, not just to satisfy their curiosity, but so they could share it with their families. The wanted to enjoy using the '*secret*'. So there's motivation in the magic.

Of course, simply telling how a number trick works is fine for some children, but for most it is the **problem solving opportunities** that are important. **Read more »**

**This resource consists of 100 cards grouped into pairs of numbers which sum to 100.**

Print and cut out some or all of the cards - you may, for example, only choose to use specific pairs of numbers:

**10-90, 20-80, 30-70...**or

**9-91, 19-81, 29-71...**or

**1-99, 11-89, 21-79...**for example

**Read more »**

**Many thanks to those mathsticks members who responded to our survey about new maths resources. **

We had a number of requests for more games focusing on the related maths concepts of **multiplication**, **factors**, **products **and **division**. Here's our first new resource for that area. **Read more »**

**We are looking for your help with this maths activity.**

Here is a problem solving puzzle in the form of a Diamond-shaped grid of squares, each square houses a number and the four sides of the Diamond should sum to the same 'magic' total.

The challenge is for the children to use their calculation and problem solving skills to complete the Diamonds by filling in the missing numbers.

**It's Party Time!**

Here's a party planning booklet that was originally devised by a student teacher. The children suddenly find they are the host of a Christmas party. They have to plan a Christmas event by selecting food, table crackers, entertainment and a party location from a range of options. The party has to suit a particular number of people and fit within a specific budget. **Read more »**