Mentally Add & Subtract to 1,000 Using Number Lines

Mental addition and subtraction to 1,000 using number lines is covered under the National Curriculum for Mathematics in England at Key Stage 2.
The curriculum expects pupils to:

• “Add and subtract numbers mentally, including a three-digit number and ones, tens, and hundreds”
  “Use concrete objects and pictorial representations, including number lines, to solve problems”
  Apply mental and written methods for increasingly large numbers up to three digits"*
  These requirements are detailed for Year 3 and Year 4, with increasing challenge through Key Stage 2 as fluency develops.

An open number line is a very flexible and versatile tool for helping with adding and subtracting within 1000. It provides visual support allowing students to use or develop their knowledge of place value in an informal setting.

There are 11 levels of differentiation for both Addition and Subtraction. Starting with a 3-digit number + or - 100 then progress in steps until both are 3-digit numbers. At each level you have an (almost) unlimited number of printable worksheets that could be used throughout the year.

• 1st number - 3 digits, 2nd number - 100
• 1st number - 3 digits, 2nd number between 95 and 105
• 1st number - 3 digits, 2nd number between 90 and 110
• 1st number - 3 digits multiple of 10, 2nd number - 100 +/ - a multiple of 10 between 10 & 50
• 1st number - 3 digits, 2nd number - 100 +/ - a multiple of 10 between 10 and 50
• 1st number - 3 digits, 2nd number - multiple of 100
• 1st number - 3 digits, 2nd number - multiple of 100 +/ - 5
• 1st number - 3 digits, 2nd number - multiple of 100 +/ - 10
• 1st number - 3 digits multiple of 10, 2nd number - multiple of 100 +/ - a multiple of 10 between 10 & 50
• 1st number - 3 digits multiple of 10, 2nd number - multiple of 100 +/ - a multiple of 10 between 10 & 50
• 1st & 2nd numbers 3 digits

An new example is generated at the top of each worksheet at the click of a button. Besides being a memory jogger for students, it could be used to introduce the assignment when projected onto an Interactive whiteboard.

(Almost) Unlimited Worksheets ?
At the click of a button all numbers are randomized, and will therefore change every time.
Your students will never run short of new worksheets to practice with.

Full graphical solutions are provided for all worksheets

Never downloaded a resource from Jeff’s Notebooks before ?
Wondering what (almost) unlimited worksheets means?
Download one of the FREEBIES at the top of Jeff’s Notebooks page when you click here, click on a button and see for yourself how they work.

Note
This resource works with the official Adobe Acrobat Reader on Windows or Mac computers.