Tính. a) 2024 + 1118 + 2026 + 1032 b) 5 × 8 × 20 c) 29 × 2 – 9 × 2
Giải thích
a) 2 024 + 1 118 + 2 026 + 1 032 = 2 024 + 2 026 + 1 118 + 1 032 = 4 050 + 2 150 = 6 200 | b) 5 × 8 × 20 = 5 × 20 × 8 = 100 × 8 = 800 |
c) 29 × 2 – 9 × 2 = 2 × (29 – 9) = 2 × 20 = 40 | d) 17 549 × (60 – 12 × 5) = 17 549 × (60 – 60) = 17 549 × 0 = 0 |