Grade 1 Math · Level 1, Add & Subtract to 10
Count to Subtract
How the lesson starts: Count to Subtract
Penny's ice stairs
Hello, friend! Meet Penny the penguin. Penny lives on a snowy hill with number steps. She loves to slide back down. Wheee! Let's count with Penny.
Slide back
Penny is on step 9. She slides back 2 steps. Down to 8. Down to 7. Penny lands on 7! Moving back makes the numbers smaller.
A longer slide
Penny is on 15. She moves 4 steps back. Watch out! Don't count 15. Penny is already there. 14, 13, 12, 11. Penny lands on 11!