Question

1.25×2.5×32×4.2×99×4.2简便计算？

Answer 1

1.25×2.5×32×4.2×99×4.2
=1.25×2.5×(4×8)×4.2×99×4.2
=(1.25×8)×(2.5×4)×4.2×99×4.2
=10×10×4.2×99×4.2
=(10×4.2)×(10×4.2)×99
=42×42×99
=1764×(100-1)
=176400-1764
=174636

Answer 2

1.25×2.5×32×4.2×99×4.2
=(1.25×2.5×32)x【4.2x(100-1)x4.2 】
=（1.25*2.5*4*8）x 【（420-4.2）x4.2 】燃旁
=(4*2.5)*(8*1.25) x（皮唤橡链渣1764-17.64）
=（10*10）x（1764-17.64）
=100 x（1764-17.64）
=100 x1746.36
=174636