1道小学数学题！！！就1个啊！！！！！！！！

漏了一个左括号：

如果是：
(8/9*5/16+(7/16-4/16))÷1/2
= (5/18 + 3/16) * 2
= 5/9 + 3/8
= 67/72

如果是：
8/9*(5/16+(7/16-4/16))÷1/2
= 8/9 * (5/16 + 3/16) * 2
= 8/9 * 1/2 * 2
= 8/9 * (1/2 * 2)
= 8/9

8/9*5/16+(7/16-4/16))÷1/2
=5/18+3/16÷1/2
=5/18+3/8
=47/72

8/9*5/16+(7/16-4/16))÷1/2
=5/18+3/8
=47/72

8/9*5/16+(7/16-4/16))÷1/2
=8/9*5/16+3/16*2
=5/18+3/8
=20/72+27/72
=47/72

8/9*5/16+(7/16-4/16))÷1/2
=5/18+3/16*2
=5/18+3/8
=40/144+54/144
=94/144
=47/72

8/9*5/16+(7/16-4/16))÷1/2
=8/9*5/16+3/16*2
=5/18+3/8
=20/72+27/72
=47/72