ІІ ЧАСТИНА. I. Тисяча » 1
3 • 6 = 18; 7 • 8 = 56; 7 • 7 = 49; 9 • 9 = 81; 36 : 9 = 4; 72 : 8 = 9; 81 : 9 = 9; 36 : 4 = 9; 72 : 9 = 8.
3 • 6 = 18; 7 • 8 = 56; 7 • 7 = 49; 9 • 9 = 81; 36 : 9 = 4; 72 : 8 = 9; 81 : 9 = 9; 36 : 4 = 9; 72 : 9 = 8.