3/35÷3/35×2
=1×2
=2
4/9×8/7×9/4
=8/7
4/7×(3/4+7/9)
=4/7×3/4+4/7×7/9
=3/7+4/9
=(27+28)/63
=55/63
5/8÷3/7÷5/4
=5/8×7/3×4/5
=7/6
3/35÷3/35×2
=1×2
=2
4/9×8/7×9/4
=8/7
4/7×(3/4+7/9)
=4/7×3/4+4/7×7/9
=3/7+4/9
=(27+28)/63
=55/63
5/8÷3/7÷5/4
=5/8×7/3×4/5
=7/6