Tính. (2 điểm) a) 2024 + 1118 + 2026 + 1032 b) 4 × 9 × 25
Giải thích
a) 2024 + 1118 + 2026 + 1032 = (2024 + 2026) + (1118 + 1032) = 2050 + 2150 = 4200 | b) 4 × 9 × 25 = (4 × 25) × 9 = 100 × 9 = 900 |
c) 7 × 234 + 7 – 35 × 7 = 7 × (234 + 1 – 35) = 7 × 200 = 1 400 | d) 19 104 × (48 – 16 × 3) = 19 104 × (48 – 48) = 19 104 × 0 = 0 |