The Year 2 Add Three 1-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
total/altogether: The new whole number that is created by adding parts together.
ten frame: A representation to help us count and make groups of 10.
commutative: Numbers can change position in an addition or multiplication number sentence and the answer stays the same e.g. 4 + 5 = 9 is the same as 5 + 4 = 9.
number bonds: Two numbers that join together to make a different whole number.
Varied Fluency
Knowledge Organiser
• Designed to support all children via key information and examples.
Scaffolded Examples
• Counting counters on ten frames to add three numbers; using a bond to 10 first.
Support
• Q1: Use ten frames to add three numbers, first step given.
• Q2: Find the bond to 10 first, then add the third number; ten frames given.
• Q3: Find the missing last number. The first two numbers always make 10.
Core
• Q1: Use ten frames to add three numbers.
• Q2: Use a bond to 10 to add; another number sits between the bond.
• Q3: Find the missing middle number. The first and last numbers always make 10.
Stretch
• Q1: Use ten frames to write and solve the whole number sentence.
• Q2: Find the bond to 10 and the number left over, then find the total.
• Q3: Find the missing middle number. The missing number and one other number make 10.
Reasoning and Problem Solving
Support
• Q1: Reasoning – explain whether a character has added three numbers correctly; first two numbers are a bond to 10, ten frames given.
• Q2: Reasoning – explain whether each step of a worked answer is correct, first two numbers are a bond to 10, ten frames given.
• Q3: Problem Solving – add a third number to a bond to 10 so the total fits a rule.
Core
• Q1: Reasoning – explain whether a character has added three numbers correctly; first and last numbers are a bond to 10, ten frames given.
• Q2: Reasoning – explain whether each step of a worked answer is correct, first and last numbers are a bond to 10, ten frames given.
• Q3: Problem Solving – add a third number to two numbers so the total is in a range.
Stretch
• Q1: Reasoning – explain whether a character has added three numbers correctly.
• Q2: Reasoning – explain whether each step of a worked answer is correct; check that each bond really makes 10.
• Q3: Problem Solving – add a third number that meets an odd or even rule and a total rule.
Deeper Reasoning
The question in this set focuses on problem solving with addition to deepen understanding in adding numbers using concrete objects, pictorial representations, and mentally, including three 1-digit numbers.
