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# Year 2 Block A – Counting, partitioning and calculating

## The focuses of mathematics learning within this block are:

• Place value in 2- and 3- digit numbers
• Partition into multiples of 10 and ones
• Comparing, ordering, reading and writing 2-digit and 3-digit numbers
• Use the < and > symbols
• Patterns and sequences
• Counting on and back in steps of different sizes
• Odd and even numbers
• Mental methods
• Addition/subtraction of 1- and 2- digit numbers
• Partitioning and counting on/back
• Solving problems and puzzles involving understanding of numbers and operations; explaining their methods and justifying decisions
The objectives for the block are listed in the table – the right hand column indicates how the objectives might be addressed in the units
Objectives Unit 1 Unit 2 Unit 3
Present solutions to puzzles and problems in an organised way; explain decisions, methods and results in pictorial, spoken or written form, using mathematical language and number sentences
Read and write two-digit and three-digit numbers in figures and words; describe and extend number sequences and recognise odd and even numbers
Count up to 100 objects by grouping them and counting in tens, fives or twos; explain what each digit in a two-digit number represents, including numbers where 0 is a place holder; partition two-digit numbers in different ways, including into multiples of 10 and 1
Order two-digit numbers and position them on a number line; use the greater than > and less than < signs
Estimate a number of objects; round two-digit numbers to the nearest 10
Add or subtract mentally a one-digit number or a multiple of 10 to or from any two-digit number; use practical and informal written methods to add and subtract two-digit numbers
Understand that subtraction is the inverse of addition and vice versa; use this to derive and record related addition and subtraction number sentences
Use the symbols +, −, × , ÷ and = to record and interpret number sentences involving all four operations; calculate the value of an unknown in a number sentence (e.g. ☐ ÷ 2 = 6, 30 − ☐ = 24)