17/81*35+46/81*17
81/1+81/3+81/5+81/7+81/9+81/11+81/13+81/15+81/17=
52 46 3837 35 4279 81 80
概率 (18 17:46:35)
计算:(-81)+(-29); (-17)+21;35+(-2.3)(-1.2)+1.80+(-45);--------
17+18+19+......+81如何简便运算?
4. 81 77 68 52 ( ) A.27 B.35 C.43 D.475. 65 35 17 ( ) 1 A.9
1,9,11,15,17,19,21,27,33,35,37,41,45,49,57,65,72,81质数有
(0.36×5.1×81)÷(o.17×8.1×0.4),怎样计算
15+16+17+18+19+20+.+81=多少?
简便运算 81除以14+17*1/14
1000-81-19-82-18-83-17-84-16-85-15-84-16-83-17-82-18-81-19
81