[(1+1)*2+(4+6)*2]*3+27等于多少
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[(1+1)*2+(4+6)*2]*3+27等于多少[(1+1)*2+(4+6)*2]*3+27等于多少[(1+1)*2+(4+6)*2]*3+27等于多少[(1+1)×2+(4+6)×2]×3+27
[(1+1)*2+(4+6)*2]*3+27等于多少
[(1+1)*2+(4+6)*2]*3+27等于多少
[(1+1)*2+(4+6)*2]*3+27等于多少
[(1+1)×2+(4+6)×2]×3+27
=(4+20)×3+27
=72+27
=99
147
1、2、2、4、3、6、4、( )、(
1+2+3/6+1/4=
1,2,2,3,4,6,( )
(6)2(1)(2)(3)(4)
1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),
1/2-(3/4-3/8), 1/2+1/4-1/6 , 2/3+(1/2+1/4),1/2-(3/4-3/8), 1/2+1/4-1/6 , 2/3+(1/2+1/4),
1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),
(-2/3)+(-1/6)+1/4-1/2
习题2.8 -2/3+(-1/6)-(-1/4)-1/2
-1/2+(-1/6)-(-1/4)-2/3
简算:1/1*2+1/2*3+1/3*4+1/4*5+1/5*6
1+2+3+1+2+3-4+5+6
2/1:3/1:4/1:6/1怎么得出等于6:4:3:2
简算:24×(1/2+1/3-1/4-1/6)
(1/2+1/3+1/4+1/6)*24
1+1 1+3 6-3 4-2
巧算:(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)=====
计算 3 1 4 1 3 -1 2 11 2 3 2 5 0 6 2