解:(5/12-3/7)-4/7-7/12等于( -7/6 )
∵已知需求出(5/12-3/7)-4/7-7/12等于多少
∴(5/12 - 3/7) - 4/7 - 7/12
= 5/12 - 3/7 - 4/7 - 7/12
= (5/12 - 7/12)- 3/7 - 4/7
= -2/12 - (3/7 + 4/7)
= -1/6 - 7/7
= -1/6 - 1
= -1/6 - 6/6
= -7/6
答:(5/12-3/7)-4/7-7/12等于-7/6
(5/12-3/7)-4/7-7/12
=5/12-3/7-4/7-7/12
=5/12-7/12-3/7-4/7
=-2/12-1
=-1/6-1
=-1又1/6
(-1又6分之1)