9×(2/3)+9×(1/3)=
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9×(2/3)+9×(1/3)=9×(2/3)+9×(1/3)=9×(2/3)+9×(1/3)=9
9×(2/3)+9×(1/3)=
9×(2/3)+9×(1/3)=
9×(2/3)+9×(1/3)=
9
9×(2/3)+9×(1/3)=
1×9+2=1112×9+3=111()×9+()=1111()×9+()=11111()×9+()=111111()×9+()=1111111()×9+()=11111111()×9+()=111111111
(0.75-16/3)*(9/2+3/1)=
19=1*9+(1+9) 29=2*9+(2+9) 39=3*9+(3+9) .1289=________ (向前面一样)
(-5)-(+3)+(-9)-(-7)+2/1=?
(3又9/2+9又3/2)÷(9/1=3/1)得简便算法怎么算?谁知道(3又9/2+9又3/2)÷(9/1=3/1)的简便算法
9 ÷ 3(2+1) 9 ÷ 3(2+1) = 9 ÷(3x2+3x1)= 9 ÷ (6+3) = 9÷9 = 1
24点 (1)1 1 9 8 (2)9 9 5 7 (3)9 9 9 7
解下列方程:3(x-7)-2【9-4(2-x)】=22; x-1/3【x-1/3(x-9)】=1/9(x-9).3(x-7)-2【9-4(2-x)】=22;x-1/3【x-1/3(x-9)】=1/9(x-9).
2(3x-1)²=9分之2
12345679×(9×1+1)=123456790有什么发现?12345679×(9×2+1)=23456790112345679×(9×3+1)=34567901212345679×(9×4+1)=45679012312345679×(9×5+1)=56790123412345679×(9×6+1)=679012345
按规律填数.1×9+2=11.12×9+3=111.123×9+4=1111.()×9+5
7/9:( )=1/2:3/5.括号里填几?
3(x-7)-2[9-4(2-x)]=22 X-(1/3)*(X-(1/3)*(X-9))=(1/9)*(X-9)
解分式方程:9/(x^2-9)-x/(3-x)=1
3^14*(-1/9)^7=?
5/9+(3/4-1/2)
99*(1+2+3+.+8+9)