1. Домашні завдання
  2. 3 клас
  3. Математика
  4. Заїка 2020 рік

Частина 2. Номер 528

150 · 6 – 349 = (100 + 50) · 6 – 349 = 100 · 6 + 50 · 6 – 349 = 600 + 300 – 349 = 900 – 349 = 551;

23 · 3 + 230 · 3 = (20 + 3) · 3 + (200 + 30) · 3 = 60 + 9 + 600 + 90 = 759;

184 – 69 : 3 = 184 – (60 + 9) : 3 = 184 – (20 + 3) = 184 – 23 = 161;

717 – 25 · 4 = 717 – (20 + 5) · 4 = 717 – (80 + 20) = 717 – 100 = 617;

360 : 3 + 135 = (300 + 60) : 3 + 135 = (100 + 20) + 135 = 120 + 135 = 255;

480 : 4 – 48 : 4 = (400 + 80) : 4 – (40 + 8) : 4 = (100 + 20) – (10 + 2) = 120 – 12 = 108;

135 + 27 · 3 = 315 + (20 + 7) · 3 = 315 + (60 + 21) = 315 + 81 = 396;

225 · 3 + 125 · 3 = (200 + 20 + 5) · 3 + (100 + 20 + 5) · 3 = 600 + 60 + 15 + 300 + 60 + 15 = 900 + 120 + 30 = 1050;

225 · 3 – 125 · 3 = (200 + 20 + 5) · 3 – (100 + 20 + 5) · 3 = 600 + 60 + 15 – (300 + 60 + 15) = 675 – 375 = 300.