(+4/5)-(+2/3)-(-1/5)-(+1/3)=4/5-2/3+1/5-1/3=(4/5+1/5)-(2/3-1/3)=1-(1/3)=1/3 这题错在那里是有理数的减法
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(+4/5)-(+2/3)-(-1/5)-(+1/3)=4/5-2/3+1/5-1/3=(4/5+1/5)-(2/3-1/3)=1-(1/3)=1/3 这题错在那里是有理数的减法
(+4/5)-(+2/3)-(-1/5)-(+1/3)=4/5-2/3+1/5-1/3=(4/5+1/5)-(2/3-1/3)=1-(1/3)=1/3 这题错在那里
是有理数的减法
(+4/5)-(+2/3)-(-1/5)-(+1/3)=4/5-2/3+1/5-1/3=(4/5+1/5)-(2/3-1/3)=1-(1/3)=1/3 这题错在那里是有理数的减法
(+4/5)-(+2/3)-(-1/5)-(+1/3)=4/5-2/3+1/5-1/3)=1-(1/3)=1/3
=(4/5+1/5)-(2/3-1/3) 这儿错了,应该是=(4/5+1/5)-(2/3+1/3)
=(4/5+1/5)-(2/3-1/3)错在这里 应该是(4/5+1/5)-(2/3+1/3) =0
错在最后那了=(4/5+1/5)-(2/3-1/3)=1-(1/3)=1/3,
应该是=(4/5+1/5)-(2/3+1/3)=1-1=0
判断:1/4+2/5+3/5=1/4+(2/5+3/5)对错
0-(+2/1)-(+5/2)-(-4/3)-(+4/1)-(-5/3)
5/9+(3/4-1/2)
4/5+(3/8-1/2)
(2*3*4*5)*(1/2-1/3-1/4-1/5)
(1/3+2/3)+(1/4+2/4+3/4)+(1/5+2/5+3/5+4/5)+.+(1/100+.99/100)=
(1) (2) (3) (4) (5)
1)2)3)4)5)
1) 2) 3) 4) 5)
计算2*3*4*5*(1/2-1/3+1/4-1/5)
1/2+(1/3+2/3)+(1/4+2/4+3/4)+(1/5+2/5+3/5+4/5)+.+(1/50+.+49/50)怎么解?
2/3,1,6/5,4/3,( ),3/2
4×(-1/2²)-3/2×(-2/5)
(4/5+1/4)÷2/3+3/10
4、5、1、2、3、4、5
-1-(-2)-(+3)+(-4)-(-5)
1 2 2 4 3 8 4 16 5 ()
1,2,2,4,3,8,4,16,5,( )