问题
解答题
脱式计算. 300-64×84÷28 4-1÷3-
(2
[1
|
答案
(1)300-64×84÷28,
=300-5276÷28,
=300-192,
=108;
(2)4-1÷3-
×8,1 3
=4-
-1 3
,8 3
=4-(
+1 3
),8 3
=4-3,
=1;
(3)(2
+0.6÷4 5
)×2.4,6 35
=(2
+4 5
)×2.4,7 2
=6.3×2.4,
=15.12;
(4)[1
-(1 8
+0.35)÷113 20
]×3.2,1 7
=[1
-1÷11 8
]×3.2,1 7
=[1
-1 8
]×3.2,7 8
=
×3.2,2 8
=0.8.