Question

333乘334的积再加999乘222的积。怎样用简便方法脱式计算？

Answer 1

333x(333+1)+(1000-1)x222=111(999+3+2000-2)=111x3000=333000

Answer 2

111222+1000*222-222=111222+222000-222=333000

Answer 3

333×334＋999×222＝333×334＋333×﹙3×222 ﹚＝333×﹙334＋666﹚＝333×1000＝333000