Subtraction Strategies: Two & Three-Digit Numbers

Year 2 Mathematics Learning different ways to subtract Jump strategy, MAB blocks, and split strategy

What is Subtraction?

Taking away or removing objects Finding the difference between numbers The opposite of addition We use the minus sign (-)

Let's Practice: 25 - 12

Work with a partner Use any method you know Share your answer with the class Did everyone get the same result?

Strategy 1: The Jump Strategy

Start with the bigger number Jump backwards on a number line Take big jumps first, then small jumps Count how far you jumped

Jump Strategy Example: 25 - 12

Strategy 2: MAB Blocks

Use blocks to show your number Take away the blocks you need to subtract Trade a ten for ten ones if needed Count what's left

MAB Block Challenge

Build 34 with MAB blocks Take away 16 What's your answer? Check with a partner

Strategy 3: Split Strategy

Break numbers into tens and ones Subtract the tens first Then subtract the ones Add your answers together

Checking Our Answers

{"left":"Jump Strategy: 25 - 12 = 13\nMAB Blocks: 25 - 12 = 13","right":"Split Strategy: 25 - 12 = 13\nAll methods give the same answer!"}

Which Strategy Do You Like Best?

Think about which method felt easiest Which one helped you understand better? Can you explain why? Remember: different strategies work for different people!