Big numbers are made of tens (tall rods of 10) and ones (single cubes). The number 47 means 4 tens and 7 ones. Build a number and watch it split apart.
1. I am a number. My tens digit is 6 and my ones digit is 3. What am I? (tap to check) 63!
2. What is 10 more than 58? And 10 less? 68 and 48 — only the tens digit changes.
3. Put these in order, smallest first: 71, 17, 77, 27. 17, 27, 71, 77 — compare tens first, then ones.
In 27 the 2 means twenty. In 72 the 2 means just two. Same digit — but where it sits changes everything. That's place value, and it's the secret behind every big number you'll ever read.