问题 解答题
脱式计算.
300-64×84÷28
4-1÷3-
1
3
×8
(2
4
5
+0.6÷
6
35
)×2.4
[1
1
8
-(
13
20
+0.35)÷1
1
7
]×3.2.
答案

(1)300-64×84÷28,

=300-5276÷28,

=300-192,

=108;

(2)4-1÷3-

1
3
×8,

=4-

1
3
-
8
3

=4-(

1
3
+
8
3
),

=4-3,

=1;

(3)(2

4
5
+0.6÷
6
35
)×2.4,

=(2

4
5
+
7
2
)×2.4,

=6.3×2.4,

=15.12;

(4)[1

1
8
-(
13
20
+0.35)÷1
1
7
]×3.2,

=[1

1
8
-1÷1
1
7
]×3.2,

=[1

1
8
-
7
8
]×3.2,

=

2
8
×3.2,

=0.8.

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