Subtraction Detectives is a set of three subtraction activities to use throughout your subtraction unit. For each activity, cut out the cards containing subtraction problems and "hide" them around the room. Students then use the corresponding worksheet and search for the subtraction problems. When they find one, they solve it on their worksheet. Each card has a letter on it that corresponds to a letter in a box on the worksheet where they can solve it. Your students will love practicing their subtraction skills while being up and moving around. These activities do not have regrouping. -It is the same activity but three different levels. The first is subtracting 2-digit with 2-digit numbers without regrouping. The second is subtracting 3-digit with 2-digit numbers without regrouping. And the last is subtracting 3-digit with 3-digit numbers without regrouping.