10 PowerPoint slideshows for second grade math in one bundle for half-price. Fully-animated. Just click and go. Each is five minutes long for a quick math warm-up covering: skip-counting, odd and even, adding and subtracting, comparing, word name, counting coins, 2-D and 3-D shapes, multiples of ten, place value, two-digit and three-digit numbers.Students have five seconds to solve a problem, and then the answer shows for two seconds. Perfect for improving mental math proficiency and problem