`4/15 < 4/13`
`7/6 > 8/9`
`14/11 > 14/19`
`5/6 >3/4`
`4/15 <4/13`
`7/6 >8/9`
`14/11 >14/19`
`5/6 >3/4`
`4/15 < 4/13`
`7/6 > 8/9`
`14/11 > 14/19`
`5/6 >3/4`
`4/15 <4/13`
`7/6 >8/9`
`14/11 >14/19`
`5/6 >3/4`
Điền dấu thích hợp vào chỗ chấm
9/14 ... 11/14 4/25 ... 4/23 5/6 ... 7/8 1 ... 14/15
8/9 ... 24/27 20/19 ... 20/27 8/7 ... 9/8 1 ...15/14
1/2+2/3+3/4+4/5+5/6+6/7+7/8+8/9+9/10+10/11+11/12+12/13+13/14+14/15=?
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20=?
điền dấu lớn bé = vào chỗ chấm
9/8-5/6 .... 17/27-4/9
6-15/4....3/2+3/4
11/3-[5/3+2/3].....11/3-5/3-2/3
19/13+4/13-10/13....19/13-10/13+4/13
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+...100=
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+.....+99999999999956214 (tính tỏng)
1+2-3-4+5+6-7-8+9+10-11-12+13+14-15-16+17+18-19-20...+301+302
Tính nhanh:
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26=