Place Value & Number Strategies

Year 3 Mathematics NSW Curriculum Understanding numbers to tens of thousands

What is Place Value?

Every digit has a special place The place tells us the value Same digit, different places = different values Example: 5 in 15 vs 5 in 50

Place Value Chart

Build the Number Game

Teacher calls out a number Students use place value cards Build numbers like 3,247 Check with your partner

Think and Share

Which number is larger? 4,567 or 4,576? How do you know? What strategy did you use?

Mental Math Strategies

{"left":"Breaking apart numbers\nUsing friendly numbers\nCounting on and back","right":"Making tens and hundreds\nUsing doubles\nCompensation method"}

Addition Strategies in Action

Example: 156 + 78 Break apart: 150 + 6 + 70 + 8 Add hundreds, tens, ones separately 150 + 70 = 220, then 6 + 8 = 14 Final answer: 220 + 14 = 234

Subtraction Challenge

Try: 324 - 167 Use any strategy you like Show your working Compare methods with classmates

Remember This!

Mathematics is not about speed, it's about understanding patterns and making connections.

What We Learned Today

Place value determines digit worth Mental math strategies help us calculate Breaking apart numbers makes problems easier Different strategies work for different people Practice helps build confidence