问题
解答题
简算.
|
答案
(1)648-187-113
=648-(187+113)
=648-300
=348;
(2)375-(175+94)
=375-175-94
=200-94
=106;
(3)642-298
=642-(300-2)
=642-300+2
=342+2
=344;
(4)486+598
=486+600-2
=1086-2
=1084.
简算.
|
(1)648-187-113
=648-(187+113)
=648-300
=348;
(2)375-(175+94)
=375-175-94
=200-94
=106;
(3)642-298
=642-(300-2)
=642-300+2
=342+2
=344;
(4)486+598
=486+600-2
=1086-2
=1084.