20 questions and answers slide show; with sound effects. A 2 minute test; ideal for a mental or oral warm up activity. Aligned with Common Core State Standards: 3.OA.1, Operations and Algebraic Thinking; 4.NBT.5, Number and Operations in Base Ten; 5.NBT.5; 6.EE.1.
20 questions rounding to the nearest 10 questions and answers on a 5 minute timer. Mental math exercise on a timer. Good for math explanations/ justifications