Activities to extend students who know the basic addition and subtraction facts well. These activities use larger numbers, to extend the range of questions which students can manage in their heads.

• ### Extended Addition & Subtraction: Teaching Strategies Extended Double Addition & Subtraction

Teacher notes: Strategies to extend students’ ability to handle mentally addition and subtraction facts with larger numbers.

• ### Extended Addition & Subtraction: Count On & Back 1

Revision and extension of the strategy of “Count on 1, 2 & 3”. Space is included to record student’s time and accuracy.

• ### Extended Addition & Subtraction: Count On & Back 2

Revision and extension of the strategy of “Count back 1, 2 & 3”. Space is included to record student’s time and accuracy.

• ### Extended Addition & Subtraction: Count On & Back 3

Revision and extension of the strategy of “Difference of 1, 2 & 3”. Space is included to record student’s time and accuracy.

• ### Extended Addition & Subtraction: Rainbow Facts

Revision and extension of the “Rainbow facts” strategy. Space is included to record student’s time and accuracy.

• ### Extended Addition & Subtraction: Special Cases

Revision and extension of the special cases +0, +10. Space is included to record student’s time and accuracy.

• ### Extended Addition & Subtraction: Double

Revision and extension of the strategy of “Doubling” or “Halving”. Space is included to record student’s time and accuracy.

• ### Extended Addition & Subtraction: Double Plus 1

Revision and extension of the strategy related to “Doubles +1”. Space is included to record student’s time and accuracy.

• ### Extended Addition & Subtraction: Near 10 Plus 9

Revision and extension of the “Near 10” strategy for +9 facts. Space is included to record student’s time and accuracy.

• ### Extended Addition & Subtraction: Near 10 Plus 8

Revision and extension of the “Near 10” strategy for +8 facts. Space is included to record student’s time and accuracy.

• ### Extended Addition & Subtraction: Revision

Revision and extension of the remaining facts 7+4 and 7+5, and related subtraction facts. Space is included to record student’s time and accuracy.

• ### Extended Addition & Subtraction: Assessment

Set of 5 assessment tests to check on how students are progressing with each of the units in the Extended Addition & Subtraction Facts series of worksheets.

• ### Extended Addition & Subtraction: Homework

Set of 20 homework sheets to match each of the sets in the Extended Addition & Subtraction Facts series. Contains information for parents.

• ### Mental Strategies: Adding Nice Numbers

Adding strings of numbers by finding pairs of numbers that go together nicely.