问题
解答题
2001-1998+1995-1992+…+15-12+9-6+3.
答案
(2)2001-1998+1995-1992+…+15-12+9-6+3,
=(2001-1998)+(1995-1992)+…+(15-12)+(9-6)+3,
=[(2001÷3-1)÷2]×3+3,
=[666÷2]×3+3,
=333×3+3,
=1002.
2001-1998+1995-1992+…+15-12+9-6+3.
(2)2001-1998+1995-1992+…+15-12+9-6+3,
=(2001-1998)+(1995-1992)+…+(15-12)+(9-6)+3,
=[(2001÷3-1)÷2]×3+3,
=[666÷2]×3+3,
=333×3+3,
=1002.