Позатабличне множення і ділення » 528

150 • 6 – 349 = (100 + 50) • 6 – 349 = 600 + 300 – 300 – 49 = 600 – 49 = 551 23 • 3 + 230 • 3 = (23 + 230) • 3 = 253 • 3 = (200 + 50 + 3) • 3 = 600 + 150 + 9 = 759 184 – 69 : 3 = 184 – (60 + 9) : 3 = 184 – 20 – 3 = 164 – 3 = 161 717 – 25 • 4 = 717 – (20 + 5) • 4 = 717 – (80 + 20) = 717 – 100 = 617 360 : 3 + 135 = (300 + 60) : 3 + 135 = 100 + 20 + 135 = 100 + 155 = 255 480 : 4 – 48 : 4 = (400 + 80) : 4 – (40 + 8) : 4 = 100 + 20 – 10 – 2 = 100 + 8 = 108 315 + 27 • 3 = 315 + (20 + 7) • 3 = 315 + 60 + 21 = 336 + 60 = 396 225 • 3 + 125 • 3 = (200 + 20 + 5) • 3 + (100 + 20 + 5) • 3 = 600 + 60 + 15 + 300 + 60 + 15 = 900 + 120 + 30 = 900 + 150 = 1050 225 • 3 – 125 • 3 = (200 + 20 + 5) • 3 – (100 + 20 + 5) • 3 = 600 + 60 + 15 – 300 – 60 – 15 = 300