3/7 × 49/9 - 4/3 2.8/9 × 15/36 + 1/27 3.12×3/7 × 49/9 - 4/3 8/9 × 15/36 + 1/27 12× 5/6 – 2/9 ×3 8× 5/4 + 1/4 6÷ 3/8 – 3/8 ÷6 4/7 × 5/9 + 3/7 × 5/9 5/2 -( 3/2 + 4/5 ) 7/8 + ( 1/8 + 1/9 ) 9 × 5/6 + 5/6 3/4 × 8/9 - 1/3 7 × 5/4

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 03:26:40
3/7×49/9-4/32.8/9×15/36+1/273.12×3/7×49/9-4/38/9×15/36+1/2712×5/6–2/9×38×5/4+1/46÷3/8–3/8÷64/7×5/9+3

3/7 × 49/9 - 4/3 2.8/9 × 15/36 + 1/27 3.12×3/7 × 49/9 - 4/3 8/9 × 15/36 + 1/27 12× 5/6 – 2/9 ×3 8× 5/4 + 1/4 6÷ 3/8 – 3/8 ÷6 4/7 × 5/9 + 3/7 × 5/9 5/2 -( 3/2 + 4/5 ) 7/8 + ( 1/8 + 1/9 ) 9 × 5/6 + 5/6 3/4 × 8/9 - 1/3 7 × 5/4
3/7 × 49/9 - 4/3 2.8/9 × 15/36 + 1/27 3.12×
3/7 × 49/9 - 4/3
8/9 × 15/36 + 1/27
12× 5/6 – 2/9 ×3
8× 5/4 + 1/4
6÷ 3/8 – 3/8 ÷6
4/7 × 5/9 + 3/7 × 5/9
5/2 -( 3/2 + 4/5 )
7/8 + ( 1/8 + 1/9 )
9 × 5/6 + 5/6
3/4 × 8/9 - 1/3
7 × 5/49 + 3/14
6 ×( 1/2 + 2/3 )
8 × 4/5 + 8 × 11/5
14.31 × 5/6 – 5/6
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
3 × 2/9 + 1/3
5/7 × 3/25 + 3/7
3/14 ×× 2/3 + 1/6

3/7 × 49/9 - 4/3 2.8/9 × 15/36 + 1/27 3.12×3/7 × 49/9 - 4/3 8/9 × 15/36 + 1/27 12× 5/6 – 2/9 ×3 8× 5/4 + 1/4 6÷ 3/8 – 3/8 ÷6 4/7 × 5/9 + 3/7 × 5/9 5/2 -( 3/2 + 4/5 ) 7/8 + ( 1/8 + 1/9 ) 9 × 5/6 + 5/6 3/4 × 8/9 - 1/3 7 × 5/4
3/7 × 49/9 - 4/3
=7/3 - 4/3
=1
8/9 × 15/36 + 1/27
=10/27 + 1/27
=11/27
12× 5/6 – 2/9 ×3
=10-2/3
=9又1/3
8× 5/4 + 1/4
=10+1/4
=10又1/4
6÷ 3/8 – 3/8 ÷6
=6×8/3 – 3/8×1/6
=16-1/16
=15又15/16
4/7 × 5/9 + 3/7 × 5/9
=5/9×(4/7+3/7)
=5/9×1
=5/9
5/2 -( 3/2 + 4/5 )
=5/2 - 3/2 - 4/5
=1-4/5
=1/5
7/8 + ( 1/8 + 1/9 )
= 7/8 + 1/8 + 1/9
=1+1/9
=1又1/9
9 × 5/6 + 5/6
=5/6×(9+1)
=5/6×10
=25/3
3/4 × 8/9 - 1/3
=2/3-1/3
=1/3
7 × 5/49 + 3/14
=10/14+3/14
=13/14
6 ×( 1/2 + 2/3 )
=6×1/2+6×2/3
=3+4
=7
8 × 4/5 + 8 × 11/5
=8 × (4/5 + 11/5)
=8×3
=24
14.31 × 5/6 – 5/6
= 5/6×(14.31 –1)
=5/6×13.31
=1331/120
15.9/7 - ( 2/7 – 10/21 )
=15.9/7 - 2/7 + 10/21
=13.9/7 + 10/21
=41.7/21 + 10/21
=51.7/21
=517/210
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
=14
17/32 – 3/4 × 9/24
=17/32 – 27/96
=51/96 – 27/96
=24/96
=1/4
3 × 2/9 + 1/3
=2/3+1/3
=1
5/7 × 3/25 + 3/7
=3/7 × 1/5 + 3/7
=3/7×(1/5+1)
=3/7×6/5
=18/35
3/14 × 2/3 + 1/6
=1/7+1/6
=13/42