Add and Subtract with Dienes within 100

‘Dienes’ refer to base-ten blocks used to introduce place value, addition, and subtraction. Dienes that pupils can manipulate with their hands are common in most elementary classrooms with the rods for 10s & squares for units etc.

However at some point there needs to be a transition to the more formal methods of adding and subtracting, and this is the purpose of these resources.

Students now see the Dienes to be added or subtracted, and with simple mental arithmetic add (or subtract) the rods (10s) and the units (1s) to obtain the solution. This is where it begins.

The next step is to perform calculations where there is a need for ‘regrouping’ units into 10s for addition and ‘borrowing’ from the 10s to the units for subtraction.

This transition from physical Dienes to Dienes on paper will then provide a good foundation to move onto addition and subtraction without the need for visual support.

Worksheets & Digital Teaching Resources

Addition
Both the worksheets & teaching resources are set at two levels:

1. The sum of the units are always below 10

2. The solutions require regrouping of 10 ones as 1 ten.

Subtraction

Both the worksheets & teaching resources are again set at two levels.

1. No borrowing is required, the minuend is always larger than the subtrahend.

2. The minuend is always smaller than the subtrahend, so the solution requires borrowing from the 10s to the units

How many worksheets are in each set ?

Almost Unlimited. At the click of a button all numbers are randomised, so you can create as many different worksheets as you need for classwork, homework, revision, preparing for assessment, fillers etc and the numbers will change every time.

The Digital Teaching Resources are designed to be used on an interactive whiteboard for whole class teaching or on a computer for one-to-one tuition. You can keep on generating as many new questions as you need.

No-Prep Worksheets
These are straightforward no-prep worksheets that require very little instructions. They are ideal for lesson fillers, and to have ready for a replacement teacher if needed.

Answers are automatically generated every time.

Note
These resources work with the official Adobe Acrobat Reader on Windows or Mac computers.