(1)5.02+5.06+5.10+…+90.42(2)3.45×(4.36+9.57+8.43+2.64)×8.88÷345(3)2000-1997+1994-1991+…+14-11+8-5+4(4)2001+255×1999+510.
(1)5.02+5.06+5.10+…+90.42
(2)3.45×(4.36+9.57+8.43+2.64)×8.88÷345
(3)2000-1997+1994-1991+…+14-11+8-5+4
(4)2001+255×1999+510.
(1)5.02+5.06+5.10+…+90.42(2)3.45×(4.36+9.57+8.43+2.64)×8.88÷345(3)2000-1997+1994-1991+…+14-11+8-5+4(4)2001+255×1999+510.
(1)5.02+5.06+5.10+…+90.42
(2)3.45×(4.36+9.57+8.43+2.64)×8.88÷345
(3)2000-1997+1994-1991+…+14-11+8-5+4
(4)2001+255×1999+510.
(1)5.02+5.06+5.10+…+90.42
=(5.02+90.42)×[(90.42-5.02)÷0.04+1]÷2
=95.44×2136÷2
=101929.92;
(2)3.45×(4.36+9.57+8.43+2.64)×8.88÷345
=3.45×[(4.36+2.64)+(9.57+8.43)]×8.88÷345
=3.45×[7+18]×8.88÷345
=3.45×25×8.88÷345
=3.45×(25×8)×1.11÷345
=3.45×200×1.11÷345
=345÷345×2×1.11
=2.22;
(3)2000-1997+1994-1991+…+14-11+8-5+4
=(2000-1997)+(1994-1991)+…+(14-11)+(8-5)+4
=3×{[(2000-5)÷3+1]÷2}+4
=3×333+4
=1003;
(4)2001+255×1999+510
=2001+255×1999+255×2
=2001+255×(1999+2)
=2001+255×2001
=2001×(1+255)
=2001×256
=2000×256+1×256
=512000+256
=512256.