Lời giải và đáp án:
Bài `1:`
`a,sqrt(0,09)=sqrt(9/100)=sqrt((3/10)^2)=3/10=0,3`
`b,sqrt(0,49)=sqrt(49/100)=sqrt((7/10)^2)=7/10=0,7`
`c,sqrt(0,64)=sqrt(64/100)=sqrt((8/10)^2)=8/10=0,8`
`d,sqrt(0,16)=sqrt(16/100)=sqrt((4/10)^2)=4/10=0,4`
`e,sqrt(0,0121)=sqrt(121/10000)=sqrt((11/100)^2)=11/100=0,11`
`f,sqrt(1/64)=sqrt((1/8)^2)=1/8=0,125`
`g,sqrt(25/49)=sqrt((5/7)^2)=5/7`
`h,sqrt(49/1024)=sqrt((7/32)^2)=7/32=0,21875`
