一本书的中间一张被撕掉了，余下的页码数和正好是1000，问：:h*u1X+q;M:B0I5h3^)F7`*y4y'D
（1）这本书有多少页？:h*u1X+q;M:B0I5h3^)F7`*y4y'D
（2）撕掉的是哪一张？:h*u1X+q;M:B0I5h3^)F7`*y4y'D
算式：提示*}*~1C*Y9p/p0F)v:h*u1X+q;M:B0I5h3^)F7`*y4y'D
答：这本书有-q3T5f/Q*g5k7o8U8o+X/k1q/Q7p4K(l+p页，撕掉的是0\+Q1@'p/K张。:h*u1X+q;M:B0I5h3^)F7`*y4y'D