Tính nhanh a) 2006 × ( 43 × 10 – 2 × 43 × 5) + 100
Giải thích
a) 2006 × ( 43 × 10 – 2 × 43 × 5) + 100
= 2006 x 43 x ( 10 – 2 x 5) + 100
= 2006 x 43 x 0 + 100
= 100
a) 2006 × ( 43 × 10 – 2 × 43 × 5) + 100
= 2006 x 43 x ( 10 – 2 x 5) + 100
= 2006 x 43 x 0 + 100
= 100