Fractions: Finding the Whole
Year 2 Mathematics 40-minute lesson Learning to find the whole from fraction parts
Starter: What Are Fractions?
Fractions are parts of a whole Equal parts make fair shares The whole is the complete amount Half of 6 counters is 3 counters
What Does 'Finding the Whole' Mean?
Sometimes we know a fraction part We need to work backwards If 1/3 of sweets = 5 sweets How many sweets were there altogether?
Let's Solve Together!
Ron eats 1/3 of his sweets 1/3 equals 5 sweets How many sweets did Ron start with? Method: 5 × 3 = 15 sweets
Your Turn to Think!
1/4 of a number is 7 What is the whole number? Use your mini whiteboards Remember: part × denominator = whole
Guided Practice Problems
{"left":"1/3 of ___ = 4\n1/4 of ___ = 6\n1/2 of ___ = 9","right":"Answer: 4 × 3 = 12\nAnswer: 6 × 4 = 24\nAnswer: 9 × 2 = 18"}
Ribbon Investigation
Three ribbons of different lengths Each shows a different fraction: 1/2, 1/3, 1/4 Which fraction is biggest? Which ribbon might be longest overall?
Independent Practice Time
Complete your worksheet quietly Find the whole from fraction parts Use the method: part × denominator Put your hand up if you need help
Quick Check: Do You Understand?
If 1/3 of a number is 6, what is the whole? Show me thumbs up when you know! How did you work it out? Can you explain your method?
What Have We Learned Today?
Finding the whole from a fraction part Method: part × denominator = whole We can work backwards from fractions Fractions help us solve real problems