Part 1: follow along with your instructor. Find the difference by “taking away”. Part 2: Follow along with your instructor. Find the difference by taking away. These problems require regrouping.
- To take away 27, start by taking away 7 ones. Since there aren’t enough ones to take away, regroup. Take a tens rod and physically break it apart into ones. Now you have enough ones to take away 7.
- Finally, take away 2 tens.