The Year 3 Add 2-Digit and 3-Digit Numbers 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
place value chart: Used to identify the value of the digits that make up a number.
placeholder: 0 is used to hold a place in a number and maintain its place value.
exchange: When a digit is taken from one place value column and placed in another.
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.
Varied Fluency
Knowledge Organiser
• Designed to support all children via key information and examples.
Scaffolded Examples
• Adding a 2-digit number to a 3-digit number with counters and sentence stems.
Support
• Q1: Add a 2-digit number to a 3-digit number with counters; one exchange; sentence stems provided.
• Q2: Complete two column additions; the exchanged digit is given; up to two exchanges.
• Q3: Solve a word problem using a column addition; one exchange.
Core
• Q1: Add a 2-digit number to a 3-digit number with counters; one exchange.
• Q2: Complete two column additions; up to two exchanges.
• Q3: Solve a word problem; place the digits in the grid; two exchanges.
Stretch
• Q1: Add a 2-digit number to a 3-digit number with counters; two exchanges.
• Q2: Place the digits in the grid and complete the additions; up to two exchanges.
• Q3: Double one number to find the other, then solve a word problem; two exchanges.
Reasoning and Problem Solving
Support
• Q1: Reasoning – judge whether a character has added a 2-digit number to a 3-digit number correctly; one exchange; place value chart provided.
• Q2: Reasoning – explain if a statement is correct about two column additions.
• Q3: Problem Solving – write pairs of numbers with a total in a given range; three possibilities.
Core
• Q1: Reasoning – judge whether a character has added a 2-digit number to a 3-digit number correctly; one exchange.
• Q2: Reasoning – explain if a statement is correct about three additions.
• Q3: Problem Solving – write pairs of numbers with an exact total; three possibilities.
Stretch
• Q1: Reasoning – judge whether a character has added a 2-digit number to a 3-digit number correctly; two exchanges.
• Q2: Reasoning – explain if a statement is correct about three additions; numbers given as numerals and words.
• Q3: Problem Solving – write pairs of numbers with an exact total and a condition on the 2-digit number; three possibilities.
Deeper Reasoning
The questions in this set focus on investigating the different rides and stalls a child could visit using tokens at a funfair and using the clues to identify a missing calculation to deepen understanding in adding numbers with up to three digits, using formal written methods of columnar addition.
