Math Today we are going to play a game called Race to Zero. This game will help you get really good at subtracting tens. First graders are expected to know how to subtract groups of ten.
Part 1: Get your materials You will need your ten frames and your bundles of ten. You could also choose to use dimes if you want -- you will need 20 dimes. You will need a paperclip and a pencil or pen. You will need your tens spinner from Two Turns to Build. Make a new one if you need to.
Part 2: Play the game Watch this video to learn how.
Here are written directions. One partner will play with ten frames. One partner will play with bundles of ten. (If you want to make or gather more materials so partners can play with the same materials, that is fine. Dimes would also work very well for this game. Most people probably have 20 dimes at home! Then each partner would start with ten dimes.)
Each partner starts with 100. The first partner spins the spinner, takes away that number of objects, and announces his or her number sentence (Example: 100 minus 20 equals 80. Another example: 100 take away 20 is 80. Another example: 10 bundles take away 2 bundles leaves 8 bundles.) The second partner spins the spinner, takes away that number of objects from his own group of 100, and announces his number sentence. (Example: 100 take away 10 is 90.) Partners take turns until one partner reaches 0. The first one to zero wins!
Part 3: Try a challenge if you have time! It’s also okay if it’s time to be done with math for the day. Challenge 1: Race back from 120! Challenge 2: Write equations for each turn. Challenge 3: Invent your own challenge version! |