Compare the total gems from two different galaxies. Complex Example: Is
). They must first add these together and then determine how much more is needed to reach using regrouping. 2. Deep Space Subtraction with Regrouping igry dlia 2 klassa slozhnye primery innoplanetaninami
Use "Alien Base 10" blocks (visual aids) to show how Zork "breaks down" a ten to subtract from the ones column. For example, to solve , you must borrow from the tens to turn 3. Galaxy Comparisons: Greater Than / Less Than Aliens are collecting "Star Gems" from different planets. Compare the total gems from two different galaxies
Provide students with two "alien fuel cells" (numbers like Galaxy Comparisons: Greater Than / Less Than Aliens
Visualizing these jumps on a number line helps 2nd graders understand the distance between large numbers. For instance, if an alien starts at and jumps to , how far did it travel? 5. Printable Alien Math Cards