If you are looking for the perfect activity to review place value, these task cards are for you! These Place Value Riddle Task Cards are perfect for math centers - small group, whole group, independent work or even teacher table! You can scaffold by providing students with the base ten blocks.In this activity, students will find the mystery number by regrouping. Task cards are differentiated into 2-digit, 3-digit, and 4-digit. You can use them in math centers or stations. Great review for unders