倒数的认识1/12×4/7+62/3×5/6-5/1811/13×26×2/116/11×1/8×115/8＋4/5×15/16(5/6-4/9）×9/5（）×2/9=1（）×1/10=15/12×（）=13/2×（）=15/8×（）=1()×()=1

Question

倒数的认识
1/12×4/7+6 2/3×5/6-5/18 11/13×26×2/11
6/11×1/8×11 5/8＋4/5×15/16 (5/6-4/9）×9/5
（ ）×2/9=1 （ ）×1/10=1 5/12×（ ）=1 3/2×（ ）=1
5/8×（ ）=1 ( )×( )=1

Answer 1

1/12×4/7+6
=1/21+6
=6又1/21
2/3×5/6-5/18
=5/9-5/18
=5/18
11/13×26×2/11
=4
6/11×1/8×11
=6/11×11×1/8
=6×1/8
=3/4
5/8＋4/5×15/16
=5/8+3/4
=11/8
=1又3/8
(5/6-4/9）×9/5
=5/6×9/5-4/9×9/5
=3/2-4/5
=15/10-8/10
=7/10
（9/2）×2/9=1 （10）×1/10=1
5/12×（12/5）=1 3/2×（2/3）=1
5/8×（8/5）=1 (3/4)×(4/3)=1