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# The Sum Machine

## The Sum Machine

### Purpose of the tool

A machine to calculate all kinds of sums.

 Common core standards: MP4 MP5 1.OA.C.6 1.NBT.C.4 2.NBT.B.5 2.NBT.B.6 2.NBT.B.7 2.NBT.B.9 3.OA.A.2 3.OA.C.7 3.NBT.A.2 4.NBT.B.4 4.NBT.B.5

### Explanation of the tool

At the top of the screen you can enter the type of sums you would like to display on screen. You can choose between -, +, x and : sums.

At the right side of the screen there are several other options.

You can choose between 10, 20 or 30 sums.

You can select a maximum solution of a sum. If you enter a zero, the Sum Machine will decide for you.

The other buttons involve decimal crossing and division sums, and you can decide whether or not to use that function.

When you've made a selection and want to see the sums, press the 'Do the math' button.

The sums appear on screen.
In order to enter a solution, please use the blue key button. You'll see it next to the area where you can enter the solution.