15.9/7 - ( 2/7 – 10/21 ) 5/9 × 18 – 14 × 2/7 4/5 × 25/16 + 2/315.9/7 - ( 2/7 – 10/21 ) 5/9 × 18 – 14 × 2/7 4/5 × 25/16 + 2/3 × 3/4 14 × 8/7 – 5/6 × 12/15 17/32 – 3/4 × 9/24
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 16:40:57
![15.9/7 - ( 2/7 – 10/21 ) 5/9 × 18 – 14 × 2/7 4/5 × 25/16 + 2/315.9/7 - ( 2/7 – 10/21 ) 5/9 × 18 – 14 × 2/7 4/5 × 25/16 + 2/3 × 3/4 14 × 8/7 – 5/6 × 12/15 17/32 – 3/4 × 9/24](/uploads/image/z/1752341-5-1.jpg?t=15.9%2F7+-+%EF%BC%88+2%2F7+%E2%80%93+10%2F21+%EF%BC%89+5%2F9+%C3%97+18+%E2%80%93+14+%C3%97+2%2F7+4%2F5+%C3%97+25%2F16+%2B+2%2F315.9%2F7+-+%EF%BC%88+2%2F7+%E2%80%93+10%2F21+%EF%BC%89+5%2F9+%C3%97+18+%E2%80%93+14+%C3%97+2%2F7+4%2F5+%C3%97+25%2F16+%2B+2%2F3+%C3%97+3%2F4+14+%C3%97+8%2F7+%E2%80%93+5%2F6+%C3%97+12%2F15+17%2F32+%E2%80%93+3%2F4+%C3%97+9%2F24)
15.9/7 - ( 2/7 – 10/21 ) 5/9 × 18 – 14 × 2/7 4/5 × 25/16 + 2/315.9/7 - ( 2/7 – 10/21 ) 5/9 × 18 – 14 × 2/7 4/5 × 25/16 + 2/3 × 3/4 14 × 8/7 – 5/6 × 12/15 17/32 – 3/4 × 9/24
15.9/7 - ( 2/7 – 10/21 ) 5/9 × 18 – 14 × 2/7 4/5 × 25/16 + 2/3
15.9/7 - ( 2/7 – 10/21 )
5/9 × 18 – 14 × 2/7
4/5 × 25/16 + 2/3 × 3/4
14 × 8/7 – 5/6 × 12/15
17/32 – 3/4 × 9/24
15.9/7 - ( 2/7 – 10/21 ) 5/9 × 18 – 14 × 2/7 4/5 × 25/16 + 2/315.9/7 - ( 2/7 – 10/21 ) 5/9 × 18 – 14 × 2/7 4/5 × 25/16 + 2/3 × 3/4 14 × 8/7 – 5/6 × 12/15 17/32 – 3/4 × 9/24
15.9/7 - ( 2/7 – 10/21 )
= 9/7 - 2/7 + 10/21
=1+10/21
=31/21
5/9 × 18 – 14 × 2/7
=10-4
=6
4/5 × 25/16 + 2/3 × 3/4
=5/4+2/4
=7/4
14 × 8/7 – 5/6 × 12/15
=16-2/3
=15又1/3
17/32 – 3/4 × 9/24
=51/96-27/96
=24/96
=1/4