9×3×5×2
9×3×5×2
3+2-5+36+9
-9(2/5)*10(3/5)因式分解
1+2+9+5+3-10+3
(10-9/2÷3)×2/5
9分之5×5分之3×2分之9
-|-2/3-(+2/3)|-|(-1/5)+(-2/5)| |4/7-2/5|-|3/5-7/9|+|2/9-3/7|
(-9)^5×(-2/3)^5×(1/3)^5
3 5/9+4 7/9-1.625-2 3/8
从+,-,×,÷,【】中选去适当的符号添在等号左边,使等式成立5 5 5 5 5 =1 5 5 5 5 5 =3 9 9 9 9 9 =3 5 5 5 5 5 =2 5 5 5 5 5 =4 9 9 9 9 9 =20应该是9 9 9 9 9 =17
1+9+7+3+5+2/2+9/91
脱式计算 2/3+5/9-2/3+5/9 3/9-(1/4-1/9)-3/4
算一算,并找出规律1/9 2/9 3/9 4/9 5/9 6/9 7/9 8/9
2 3 4 5 6 8 9
求2,5,3,9,题
5x+2×(3-x)=9
5/9除以(2/3-0.25)=?
9/10除以2/5*3/8