This math document shows step-by-step work for solving several arithmetic problems. It includes multiplying and dividing numbers like 2 x 8 x 4 = 64, 3 x 3 x 4 = 64, and 15 x 2 x 3 = 30. It also shows adding and subtracting numbers such as 56 - 6 = 50, 56 + 9 = 65, and 15 - 3 = 12.