Renaming Numbers in Different Ways
Exploring how numbers can be shown using different place values Year 2 Mathematics Australian Curriculum
What Does 'Renaming' Numbers Mean?
Renaming means showing the same number in a different way We can break numbers apart and put them back together The value stays the same, but it looks different Like having 10 ones or 1 ten - both equal 10!
Let's Explore with Blocks!
Use your blocks to show the number 23 Try making it with 2 tens and 3 ones Now try making it with 1 ten and 13 ones What do you notice?
Breaking Down Two-Digit Numbers
Let's look at the number 47 We can show it as: 4 tens and 7 ones Or we can show it as: 3 tens and 17 ones Both equal 47!
Same Number, Different Ways
{"left":"35 = 3 tens + 5 ones\n35 = 2 tens + 15 ones","right":"35 = 1 ten + 25 ones\n35 = 0 tens + 35 ones"}
Your Turn to Think!
Can you show me 52 in three different ways? Use your blocks to prove your answers Share your thinking with a partner
Moving to Three-Digit Numbers
Let's try 234 We can show it as: 2 hundreds, 3 tens, 4 ones Or: 1 hundred, 13 tens, 4 ones Or: 0 hundreds, 23 tens, 4 ones
Build and Rename Challenge
Build 145 with blocks Now rename it using different tens Try: 1 hundred, 3 tens, 15 ones Check: Does it still equal 145?
Remember This!
The value of a number stays the same even when we rename it in different ways
What We Learned Today
Numbers can be renamed in many different ways We can trade tens for ones and hundreds for tens The total value always stays the same We used blocks to prove our thinking