The Year 2 Add and Subtract 1s PowerPoint guides both teachers and children through the lesson, including use of the varied fluency, reasoning and problem solving, deeper reasoning and scaffolded resources. Key learning information about this step:
Key Vocabulary
ones: Individual units that make up a whole number.
place value chart: Used to identify the value of the digits that make up a number. The chart is broken up into columns which represent ‘tens’, ‘ones’ and so on.
adding: Adding one quantity to another.
subtracting: Taking one quantity away from another.
Varied Fluency
Knowledge Organiser
• Designed to support all children via key information and examples.
Scaffolded Examples
• Counting the tens and ones in a place value chart; adding 1 more one, then using a number fact to add ones.
Support
• Q1: Add 1 or 2 ones using a place value chart; the ones fact is given.
• Q2: Count back 2 on a fully labelled number line; the first jump is drawn.
• Q3: Use a given number fact to find the ones digit; the tens digit is given.
Core
• Q1: Add 3 or 5 ones using a place value chart.
• Q2: Count back 3 or 4 on a fully labelled number line.
• Q3: Use a given number fact to complete each calculation.
Stretch
• Q1: Read the number in a place value chart; add ones given in words.
• Q2: Count back or forwards on a number line with only the end numbers labelled.
• Q3: Solve two calculations by finding the number fact first.
Reasoning and Problem Solving
Support
• Q1: Reasoning – decide if a character has added 1 correctly.
• Q2: Reasoning – decide if a statement about adding or subtracting 1 is always, sometimes or never true; test calculations are given.
• Q3: Problem Solving – complete a number sentence in three ways; the tens digit is given.
Core
• Q1: Reasoning – decide if a character has added ones correctly.
• Q2: Reasoning – decide if a statement about adding or subtracting the ones digit is always, sometimes or never true.
• Q3: Problem Solving – complete a number sentence in three ways; the 1-digit number is greater or less than a given number.
Stretch
• Q1: Reasoning – decide if a character has added ones with the smaller number first correctly.
• Q2: Reasoning – decide if a two-step statement about the ones digit is always, sometimes or never true.
• Q3: Problem Solving – complete a number sentence in three ways; the 1-digit number is odd or even.
Deeper Reasoning
The questions in this set focus on problem solving with addition and subtraction to deepen understanding in adding and subtracting numbers using concrete objects, pictorial representations, and mentally, including a 2-digit number and 1s.
