Способи усних обчислень частки » 539
2 • 10 = 20 20 • 10 = 200 10 • 5 = 50 100 • 5 = 500 50 : 5 = 10 50 : 10 = 5 27 • 0 = 0 0 • 48 = 0 0 : 13 = 0 13 : 13 = 1 20 • 4 = 10 • 2 • 4 = 10 • 8 = 80 200 • 3 = 100 • 2 • 3 = 100 • 6 = 600
2 • 10 = 20 20 • 10 = 200 10 • 5 = 50 100 • 5 = 500 50 : 5 = 10 50 : 10 = 5 27 • 0 = 0 0 • 48 = 0 0 : 13 = 0 13 : 13 = 1 20 • 4 = 10 • 2 • 4 = 10 • 8 = 80 200 • 3 = 100 • 2 • 3 = 100 • 6 = 600