(9) (8,1,22,5) (1) (3,15,12,4),(9) (6,5,5,12) (2,1,4)
(1/3/12+2/6/24+3/9/36+4/12/48)/(2/3/5+4/6/10+6/9/15+8/12/20)
求不定积分 (1) (2) (3) (4) (5) (6) (7) ; (8) (9) (10) (11) (12)
算24点:(1)1 5 9 12 (2)1 6 10 13 (3)2 4 8 11(4)3 5 12 12
初一数学(1).(-4/9)×(-2.3)×(+8/9) (2).(7/9-5/12+2-11/6)×(-36) (3)
计算题:(1)(-12)+(+12)-(-6) (2)【(-5)-(+9)】-(-4) (3)8
1/2+3/4-6/5 6/7-1/2+4/5 3/4-(7/12-5/7) 2/3+(13/15+1/3) 15/9-
6/7×5/9+4/9×6/7(简便计算) 0.8-(2/3+1/12)×8/9 5/6÷(6-5/12-7/12
(1)4 6 3 (2)6 9 4 (3)5 8 4 (4)10 15 6
找规律 7 4 5 22 14 26 (1) 6 14 9 12 12 ( ) (2) 10 21 9 16 8 ( )
0.3/5/6+5/2 3/7/21*7/9 12/5/(1-9/4) 【1-(8/1+0.25)】/12/5 简便运算
简算(8/15+9/20*2/3)÷1/12 (0.4+2/3)/(5/6-0.75)*0.5 方程 1/4x+3/4x
填空 (1)9,3,1,3分之1,) (2)8,2,)8分之1 (3)9分之3,12分之4,15分之5,18分之6,)