Today you will solve a mystery like a Detective! Let's find the mystery addition sums. 1. Tap 2. Watch the video for the instructions on how to complete this activity. 3. Tap 4. Move the spotlight around and discover your mystery problem sums. 4. Tap on and solve each sum by saying it aloud. Continue doing the same until you finished all the mystery problem sums. 5. Tap on to submit your work. Great work Math Detective!