1) 25 • 47 • 4 = 25 • 4 • 47 = 100 • 47 = 4700;
2) 7 • 50 • 6 • 2 = (7 • 6) • (50 • 2) = 42 • 100 = 4200.
1) 25 • 47 • 4 = 25 • 4 • 47 = 100 • 47 = 4700;
2) 7 • 50 • 6 • 2 = (7 • 6) • (50 • 2) = 42 • 100 = 4200.