问题
解答题
计算下面各题,能简算的要简算. (1)772-317+128-283 (2)(
(3)(
|
答案
(1)772-317+128-283
=772+128-(317+283)
=900-600
=300;
(2)(
-11 12
)÷(2-3 4
)1 2
=
÷1 6 3 2
=
×1 6 2 3
=
;1 9
(3)(
+1 4
+1 6
)×365 12
=
×36+1 4
×36+1 6
×365 12
=9+6+15
=30;
(4)120÷[45×(1-
)]8 9
=120÷[45×
]1 9
=120÷5
=24.