а)
1/2 * 50 = 50 : 2 * 1 = 25 * 1 = 25
б)
1/3 * 45 = 45 : 3 * 1 = 15 * 1 = 15
в)
1/4 * 120 = 120 : 4 * 1 = 30 * 1 = 30
г)
1/10 * 10 = 10 : 10 * 1 = 1 * 1 = 1
д)
1/20 * 80 = 80 : 20 * 1 = 4 * 1 = 4
е)
1/30 * 90 = 90 : 30 * 1 = 3 * 1 = 3
а)
1/2 * 50 = 50 : 2 * 1 = 25 * 1 = 25
б)
1/3 * 45 = 45 : 3 * 1 = 15 * 1 = 15
в)
1/4 * 120 = 120 : 4 * 1 = 30 * 1 = 30
г)
1/10 * 10 = 10 : 10 * 1 = 1 * 1 = 1
д)
1/20 * 80 = 80 : 20 * 1 = 4 * 1 = 4
е)
1/30 * 90 = 90 : 30 * 1 = 3 * 1 = 3