The Year 3 Add Two Numbers (No Exchange) 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
formal written method: This is also known as the column method for addition, subtraction and multiplication. For division, this may also be known as the bus stop method.
place value chart: Used to identify the value of the digits that make up a number.
exchange: When a digit is taken from one place value column and placed in another.
placeholder: 0 is used to hold a place in a number and maintain its place value.
Varied Fluency
Knowledge Organiser
• Designed to support all children via key information and examples.
Scaffolded Examples
• Using Base 10, a place value chart and sentence stems to complete a column addition.
Support
• Q1: Add two 2-digit numbers using Base 10; the digits are already written in the grid.
• Q2: Complete two column additions with 3-digit numbers; the digits are already written in the grids.
• Q3: Find one missing digit in each of two column additions.
Core
• Q1: Add two 3-digit numbers using place value counters and a blank grid.
• Q2: Write two linear additions into blank grids, then find each total.
• Q3: Find two missing digits in each of two column additions.
Stretch
• Q1: Read two 3-digit numbers from counters, including a zero, then add them.
• Q2: Complete two 3-digit additions; in one, an addend is written in words.
• Q3: Find two missing digits in each of two column additions, one in a total.
Reasoning and Problem Solving
Support
• Q1: Reasoning - judge two worked column additions involving a 3-digit and a 2-digit number and explain whether the calculations are correct.
• Q2: Reasoning - complete missing digits in 3-digit + 2-digit column additions and find two possible solutions.
• Q3: Problem Solving - choose pairs from six number cards with 2-digits and 3-digits, the total is greater than 100 and two different totals are found.
Core
H3
• Q1: Reasoning - judge two worked column additions of two 3-digit numbers and explain whether the calculations are correct.
• Q2: Reasoning - complete missing digits in 3-digit + 3-digit column additions and find three possible solutions.
• Q3: Problem Solving - choose pairs from six number cards with 3-digits, the total is greater than 300 or 400 and three different totals are found.
Stretch
• Q1: Reasoning - judge worked column additions containing zero as a placeholder and explain whether the calculations are correct.
• Q2: Reasoning - complete missing digits in 3-digit + 3-digit column additions containing zero as a placeholder and find three possible solutions.
• Q3: Problem Solving - choose pairs from six number cards with 3-digits and some cards using zero as a placeholder, the total is greater than 300 and three different totals are found.
Deeper Reasoning
The questions in this set focus on creating and solving addition calculations, matching equivalent values and finding missing values to deepen understanding in adding and subtracting numbers with up to three digits, using formal written methods of columnar addition and subtraction.
