-
3,6,8,13,20,(),51A.31B.28C.42D.32
-
3,6,8,13,20,(),51 A.31B.28C.42D.32
-
2,3,6,15,()A.20 B.24 C.32 D.42
-
2,3,6,15,() A.20 B.24 C.32 D.42
-
2, 3, 6, 15, ()。A.32 B.42 C.52 D.62
-
3, 6, 8, 13, 20, (), 51 A.31 B.28 C.42 D.32
-
(1)175-28-72(2)786-(158+286)(3)49+58+42+51(4)72720÷9÷8(5)2000÷125÷8(6)125×104-500.