Tính nhanh: 26 + 45 × 26 + 260 + 44 × 26.
Giải thích
26 + 45 × 26 + 260 + 44 × 26
= 26 × 1 + 45 × 26 + 26 × 10 + 44 × 26
= 26 × (1 + 45 + 10 + 44)
= 26 × (46 + 10 + 44)
= 26 × (56 + 44)
= 26 × 100
= 2600
26 + 45 × 26 + 260 + 44 × 26
= 26 × 1 + 45 × 26 + 26 × 10 + 44 × 26
= 26 × (1 + 45 + 10 + 44)
= 26 × (46 + 10 + 44)
= 26 × (56 + 44)
= 26 × 100
= 2600