-9*(-11)-12*(-8) (1/3-5/7-2/5)*105
-9*(-11)-12*(-8) (1/3-5/7-2/5)*105
5/6+2/9+7/18 11/12-(3/8-1/12) 2/3-1/4-1/6 7/11-1/5+8/11-4/5
初一数学(1).(-4/9)×(-2.3)×(+8/9) (2).(7/9-5/12+2-11/6)×(-36) (3)
求不定积分 (1) (2) (3) (4) (5) (6) (7) ; (8) (9) (10) (11) (12)
计算:(1+2-3)(-4+5+6-7)(-8+9+10-11)-12+...+2009.
5+(-9)= 11-(+7)= (-12)-(+2.1)= -(-15)-(-8) (-2/3)
谁能算24点?(4 11 8 9) (2 13 1 10 )(7 13 4 5)(5 11 12 6)(7 7 7 7)
2/5+1/4+3/8 11/9-2/7-5/7 11/25+(1/12+14/25) 15/18-(15/18-11/
(1)1.25*0.25*32(2)5/7+9/8*5/9+3/8(3)(3/7+5/14)/11/21-2/5能简算的
1+2-3-4+5+6-7-8+9+10-11-12+.+2005+2006=(要过程(简算))
找规律 3,2,1,7,6,5,4,10,9,8,14,13,12,11()()()()()()()
找规律:好难哦2,3,5,7,9,11,(),()4,6,8,9,10,12,(),()