数学之美团为你解答
1.[(-5)-1/8+1.25]*16
= (-5)*16 - 1/8 *16 + 1.25*16
= - 80 - 2 + 20
= - 62
2.(-3/8)*(-24-3又三分之一+0.8）
= (-3/8)*(-24) + (-3/8)*(-10/3)+(-3/8)*8/10
= 9 + 5/4 - 3/10
= 9 + 25/20 - 6/20
= 9 + 19/20
= 9又19/20