Grade 1 Math · Level 6, Grade 2 Bridge
Grade 2 Bridge: One- and Two-Step Stories Within 100
How the lesson starts: Grade 2 Bridge: One- and Two-Step Stories Within 100

Captain Mo's shells
Ahoy, friend! Meet Captain Mo, a jolly pirate. Mo collects shells. Mo has 27 shells. Mo finds 15 more. Then gives 9 to a crab. How many now?
One step at a time
More come? Add. Given away? Take away. Mo starts with 27. Step 1: add 15. Now 42. Step 2: take away 9. Now 33. Mo has 33 shells!
A new shell story
Mo has 58 shells. 20 are given away. Then 14 more come. Step 1: 58 − 20 = 38. Step 2: 38 + 14 = 52. Mo has 52 shells! Watch out! Don't stop at 38. Do every step.
