(21:0.5-41:0.25+81:0.125-101:0.1):(1+2+3+.....+2006+2007+2008)
tính nhanh
tính nhanh
1/2:0.5-1/4|:0.25+1/8:0.125-1/10:0.1
tính nhanh:
1/90:0.25+1/90:0.2+1/90:0.5+1/90:0.125-1/90:0.1
1/90:0.25+1/90:0.5+1/90:0.125-1/90:0.1
= 1/90 x 4 + 1/90 x 5 + 1/90 x 2 + 1/90 x 8 - 1/90 x 10
= 1/90 x ( 4+5+2+8-10)
= 1/90 x 9
= 1/10
k nha!Cảm ơn nhiều!
tinh nhanh
1/2/0.5-1/4/0.25+1/8/0.125-1/10/0.1
1/2:0.5-1/4:0.25+1/8:0.125-1/10:0.1
1/2 : 0.5 - 1/4 : 0.25 + 1/8 : 0.125 - 1/10 : 0.1
1/2 : 0.5 - 1/4 : 0.25 + 1/8 : 0.125 - 1/10 : 0. 1
= 1 - 1 + 1 - 1
= 0 + 0
= 0
\(\frac{1}{2}:0,5-\frac{1}{4}:0,25+\frac{1}{8}:0,125-\frac{1}{10}:0,1\)
\(=\frac{1}{2}:\frac{1}{2}-\frac{1}{4}:\frac{1}{4}+\frac{1}{8}:\frac{1}{8}-\frac{1}{10}:\frac{1}{10}\)
\(=1-1+1-1=0\)
1/2:0.5-1/4:0.25+1/8:0.125-1/10:0.1
1/2:0.5-1/4:0.25+1/8:0.125-1/10:0.1
1/2:0,5-1/4:0,25+1/8:0,125-1/10:0,1
=1-1+1-1
=0
Tính nhanh:
\(25\%+\dfrac{3}{4}+\dfrac{1}{2}:0.5-\dfrac{1}{4}:0.25+\dfrac{1}{8}:0.125\)
`25%+3/4+1/2:0,5-1/4:0,15+1/8:0,125`
`=1/4+3/4+1/2xx2-1/4xx4+1/8xx8`
`(1/4+3/4)+(1/2xx2)-(1/4xx4)+(1/8xx8)`
`=1+1-1+1`
`=2`
Các bạn giúp mình bài này nha !
1/2 : 0.5 - 1/4 : 0.25 + 1/8 : 0.125 - 1/10 : 0.1
1/2 : 0,5 - 1/4 : 0,25 + 1/8 : 0,125 - 1/10 : 0,1
= 1 - 1 + 1 - 1
= 0 + 0
= 0
1/2 : 0.5 - 1/4 : 0.25 + 1/8 : 0.125 - 1/10 : 0.1
= 1 - 1 + 1 - 1
= 0 + 0
= 0
1/2 : 0.5 - 1/4 : 0.25 + 1/8 : 0.125 - 1/10 : 0.1 = 1
đồng ý vứi mình thì k nhé