Addition and Subtraction to 20- Year 1 – Worksheets +

National Curriculum Year 1: Number – addition and subtraction
Add and subtract one-digit and two-digit numbers to 20 including zero.
Solve one-step problems that involve addition and subtraction, using concrete objects and pictorial representations, and missing number problems such as 7 = ? − 9

This resources is ideal preparation for the more formal work with building fluency with addition & subtraction with equations up to 20.

There are 12 Sets of (almost) unlimited worksheets:

Commutative law of  Addition (Set 1: up to 10 , Set 7: up to 20)
Students count objects and fill in two addition equations, showing addition’s commutative property. 

Subtraction Practice counting objects and completing two subtraction equations. (Set 2: up to 10 , Set 8: up to 20)

 Number Bonds. Find the total or find the missing number. A blank template is included for creating challenges or student-created worksheets. (Set 3: up to 10 , Set 9: up to 20)

Number Family Connections / Number Triangles. Students construct four possible equations using three connected numbers. 5 levels.(Set 4: up to 10 , Set 10: up to 20)

Number Lines. Explore how adding and subtracting the same number returns them to the starting point, illustrating the inverse relationship of addition and subtraction.
3 options: Set A: start with an addition & find the subtraction; Set B: start with a subtraction find the addition: Set 3 a mix of set A & B (Set 5: up to 10 , Set 11: up to 20)

Set 12: Building the Inverse Equation. Given   5 + 13 = 18 complete the Equation 18 – ? = 5

Almost Unlimited Worksheets in each Set ?
 At the click of a button all numbers are randomised.  This lets you to create as many new worksheets as you need for practice throughout the year (classwork, homework, revision etc) or even give small groups of students in your class different sets of questions either at the same level or differentiated. As these worksheets need little explanation, they are ideal if you need to leave work for a replacement teacher.

Answers are automatically generated when you create a new worksheet.

Note
These resources are PDF documents and work with the official  Adobe Acrobat Reader on Windows or Mac computers with the randomising buttons also working via a touchscreen (PC or Mac) or on an Interactive Whiteboard.