1+1 1+3 6-3 4-2
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1+11+36-34-21+11+36-34-2 1+11+36-34-21+1=26-3=31+3=44-2=2
1+1 1+3 6-3 4-2
1+1 1+3 6-3 4-2
1+1 1+3 6-3 4-2
1+1=2 6-3=3 1+3=4 4-2=2
1+2+3/6+1/4=
1+1 1+3 6-3 4-2
简算:1/1*2+1/2*3+1/3*4+1/4*5+1/5*6
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)=====
1、2、2、4、3、6、4、( )、(
简算:24×(1/2+1/3-1/4-1/6)
(1/2+1/3+1/4+1/6)*24
(1- 1/100)(1- 1/99) .....(1- 1/4)(1- 1/3)(1- 1/2) (-1 1/2)*(-1 1/3)*......(-1 1/6)*(-1 1/7)
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),
1/1*3+1/2*4+1/3*5+1/4*6+.+1/100*102=?
2/1:3/1:4/1:6/1怎么得出等于6:4:3:2
2(3^2+1)(3^4+1)(3^6+1)(3^8+1)要简算
(-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
1+2+3+1+2+3-4+5+6