5 * 5 - 5 = 25 - 5 = 20
20 * 20 : 20 = 400 : 20 = 20
4 * 4 + 4 = 16 + 4 = 20
20 - 20 + 20 = 0 + 20 = 20
20 + 20 - 20 = 40 - 20 = 20
5 * 5 - 5 = 25 - 5 = 20
20 * 20 : 20 = 400 : 20 = 20
4 * 4 + 4 = 16 + 4 = 20
20 - 20 + 20 = 0 + 20 = 20
20 + 20 - 20 = 40 - 20 = 20