Addition and Hinge Questions for pupil Comments Subtraction Counting On Chapter 8: Nurturing Facile Number Sequences to 20 ( Facile Number C Sequences to 20 – non count-by-one strategies to 20) O Can use understanding Compensation Look for this U of number structures to throughout. N develop and explain a Using a known T range of result I strategies to solve N tasks within 20 such as: Add to ten 7 + _ = 10 G compensation, using a known results, adding to Subtract from 10 - _ = 6 O ten, partitioning using 5 ten N and 10 as a base Partitioning 7 + 5 commutativity, using 5 and 10 subtraction as the 9 + 4 inverse of addition, awareness of the ‘ten’ in 8 + 6 a teen number, using Adding/ doubles and near subtracting 13 – 5 doubles through 10 14 – 6 15 – 7 Commutativity 2 + 9 4 + 8 Subtraction as 6 + 9 = the inverse of addition So what is 15 – 6? Awareness of 10 + 6 ten in the teen number 18 – 8 Using doubles 6 + 6 and near 7 + 6 doubles 9 + 9 18 – 9
Addition and Subtraction Hinge Questions for pupil Comments C O U N T I N G O N Counting On Chapter 8: Nurturing Facile Number Sequences to 20 ( Facile Number Sequences to 20 – non count-by-one strategies to 20) Can use understanding of number structures to develop and explain a range of strategies to solve tasks within 20 such as: compensation, using a known results, adding to ten, partitioning using 5 and 10 as a base commutativity, subtraction as the inverse of addition, awareness of the ‘ten’ in a teen number, using doubles and near doubles Compensation Using a known result Look for this throughout. Add to ten Subtract from ten 7 + _ = 10 10 - _ = 6 Partitioning using 5 and 10 Adding/ subtracting through 10 7 + 5 9 + 4 8 + 6 13 – 5 14 – 6 15 – 7 Commutativity 2 + 9 4 + 8 Subtraction as the inverse of addition 6 + 9 = So what is 15 – 6? Awareness of ten in the teen number 10 + 6 18 – 8 Using doubles and near doubles 6 + 6 7 + 6 9 + 9 18 – 9
Guidance-on-the-Early-Acquisition-of-Numeracy-in-Primary-1.docx