Bài 1 : Tính nhanh
a. ( -45 ) × 312 – 312 × ( -54 ) × (-312 )
b. -8 × 50 × ( -25 )
c. 217 × ( -46 ) – ( -217) × (-15) – 217 × 40 + 217
d. -27 × ( 30 – 15 ) + 15× ( 30 – 27 ) – 30 × ( 5 – 27 )
Bài 1 : Tính nhanh a. ( -45 ) × 312 – 312 × ( -54 ) × (-312 ) b. -8 × 50 × ( -25 ) c. 217 × ( -46 ) – ( -217) × (-15) – 217 × 40 + 217 d. -27 × (
By Kylie
a.(-45).312-312.(-54).(-312)
=[(-45)-(-54)].312.(-312)
=9.312.(-312)
=-876096