Once your pupils have got to grips with the varied fluency aspects of adding by counting on, use this Year 1 Add by Counting on within 20 Reasoning and Problem Solving worksheet to develop the more critical thinking needed to answer more challenging questions.

The resource is made up of 6 questions, of three different styles, and is differentiated three ways. The differentiation is as follows:

Developing: Add a 1-digit number to 1-digit and 2-digit numbers and identify totals more than/less than 15. Numerals only. Pictorial support.

Expected: Add a 1-digit number to 1-digit and 2-digit numbers and identify totals more than/less than 15. Numerals and use of Base 10 to represent numbers.

Greater Depth: Add a 1-digit number to 1-digit and 2-digit numbers and identify totals more than/less than 15. Numerals and words.